The article that is linked says he is being detained in the county jail, not out on bail with an ankle monitor. I was under the impression ankle monitors were issued After you were sentenced and is normally part of your sentence or probation.
My guess would be most of his legal problems are more related to the odd behavior and threats made and not just because he was transmitting illegally. If it were not for the threats I believe he probably would not be in jail. He would have been cited and then probably get a fine when he went to court. Do to the type of threats made this could probably be a federal issue if they wanted to go that route.
From the sounds of it he is a troubled man with mental health issues and needs some help. He should be getting already from the sounds of it, seems as if they already know who he is and that he has problems. Most likely won't happen though. He will probably get some time in jail, then released with more hatred than he already has.
For all we know he might have been really nice guy up until a certain age and then mental illness set in and he didn't get the proper treatment. And most likely doesn't have anyone to look after him to make sure he continues the treatment, which is often the case.
Mental illness is a serious issue in the United States, I know I suffer from it. Luckily I am not one of the many that fell through the cracks. I went to jail once for contempt of court and didn't get my meds for over two weeks. Then they treated me like it was my fault I was wigging out. If you take someone with depression and social anxiety and put them in jail with a bunch of people and then make them stop their meds cold turkey you should expect some odd behavior. And I wasn't the only one either, there were guys not getting seizure medication and stuff like that as well. The only thing they cared about was that I didn't kill myself while they were responsible for me.