I strongly advise not doing it personally. I don't think anybody's going to come out and arrest you but some of the sensitive stuff heard or talked about at times, and especially dealing with frequencies and locations, I recommend not doing it. I would personally find a group of friends that don't make public posts, and this is very easy to do and you will come across people interested in the radio community in the same thing as you, enthusiasts are out there. I can 100% state that there have been a lot of regular communications, especially in military communications In federal communications, that have gone encrypted due to seeing posts in the internet age regarding their traffic and operations as they are ongoing. And these types of public posts have disappeared and could disappear easily due to the reasons that they have been posted in groups that are publicly viewed. I'm a big military communications monitoring enthusiast and have been for quite a number of decades. And with people that I've gotten to know I have no problem sharing information and radio traffic and frequencies and things like that that I've heard. But not to the masses of people out there that you do not even know is the way I play it safe.
Back in the 1990s, during the Haiti conflict, I was listening as SAM 972 or 976, I can't remember exactly now, had ex-president Carter flying into Haiti to trying to negotiating a deal before the US was getting ready to invade. This was on HF radio on the Mystic Star frequencies used by the military Special Air Mission (aka SAM) aircraft out of Andrews Air Force Base. It was fascinating to listen to ex-President Carter calling his wife at home through a phone patch and you could tell he was used to the old days where giving his home phone number and things like that we're done over an unsecured network. He wanted to see if he left his reading glasses on the table in the vestibule. There was a timeline and he had to be out by a certain time, which was just a few hours away if I remember right, and as he was departing Haiti he called Crown (the White House Communication Agency) and told them he had secured a deal and we didn't need to invade. He was headed back to Washington. This was real cool and impending events going on and some fool that was also listening in, and we do know who it was but I'm not going to mention any names, called CNN and reported everything. They had it on the news before Carter ever even made it back to Washington and could tell the government. The military and federal government was very ticked off about this happening and within a few years HF radio was almost dead with military traffic or anything of interest anyway. HF use to be spectacular and fascinating to listen to. But nowadays you don't hear the phone patches or any of the cool stuff that used to be there because of events like this happening. This specific incident I'm mentioning was definitely a nail in the coffin of this great and fascinating radio traffic. It was even publicly mentioned on the news what this person had done later.
Here's a link to an article I just pulled up, and really haven't read yet, but thought I'd post if you're not familiar with the incident I'm talking about. I don't know if this mentions anything about the communications but it's the Haiti conflict story and what was going on.
President Carter Leads Delegation to Negotiate Peace With Haiti .
I highly recommend not posting things publicly that have to do with any military communications you really want to continue listening to. It's not that all of the communications are super important or anything like that. It's just that when the military or federal government starts seeing and hearing about things that have been posted, they do not like seeing this and they will make changes so that we can't hear this traffic. For the most part, the federal government are very cool things that have gone encrypted and you can't hear much of that traffic anymore across America. The military I don't believe is so concerned with somebody posting something about hearing an aircraft on an air traffic control frequency or minuscule stuff like that. But it's better to be safe than sorry because if they become aware of things like more important communications intercepted being heard, they'll go encrypted And we want hear them anymore. It's happened over and over with the traffic we used to could hear and lost. Thankfully they've not seemed too concerned with the UHF and VHF military aviation traffic through the years. It is mostly in the clear. Other than when there is something really important or there's some kind of issue going on with the monitoring of the traffic, they haven't done much hiding the communications or encrypting them on those bands. You'll occasionally hear some encryption and a lot of times it's just the aircraft testing their radios and making sure stuff works as it is supposed to.
I've listened to military traffic for close to 40 years. And if there is something really big going on, I make sure I do not post that kind of stuff publicly. I've got a group of friends I've met through the years and I may let them know because I know they won't do it either. It's fascinating to be able to listen to a lot of this stuff but you don't want to put it out there where just anybody can tune to it is my personal opinion. We want to be able to keep listening to these communications that are still able to be monitored and the quickest way to see them disappear is to post them on a public forum. And especially when you're putting the specifics down like frequencies and areas in a post. Technology has increased so much through the years that it's nothing for them to be able to easily use something like SATCOM and encrypt their traffic or even just encrypt the traffic they are transmitting on the frequencies they want to use. I'm sure there's a lot of people that would disagree and they just want to get the information. But I could write a book on things we used to could hear and what we've lost and a lot of it has been lost because of the internet and forums that post things anybody can see. I hate that it's become this way but it truthfully has. I'm glad we have forums like this one and we can discuss things and even post frequencies for agency ABC or whatever. It's great to be able to find others who are interested in the same thing. But when a lot of things, and especially things they don't want people to hear, start getting talked about, well, it leads to it disappearing many times.
I'm glad you asked about this question and I'm glad I could post my perspective and opinion. It sounds like a cool project you're interested in making with your photos too. But I do recommend being really careful, if you decide to do it, with what you post. And truthfully I would say that you would probably be better off not doing this. But if you do, just put general air traffic control type communications in it and not things like dog fights, exercises, missions, etc in the projects you make.
Again, this is my opinion and I'm sure there's tons of others who don't care or just want to hear this kind of stuff but they don't know necessarily where to find it. I'll shut up and stop now but it's a good question that you asked and hopefully not one that we will have to worry about losing and not being able to monitor. It's fascinating listening to the cool stuff like this. 73!