Reality is you can look at any post on Facebook then get beyond mountains of information on them people just by them posting their name, their family, aliases, known names, properties, worth, schools, purchases, kids, you name it, some free, some information for 30 bucks which isn't much for a thief to spend if they are a career identity theft perp . Just by them having a facebook you open not only that but a digital footprint which yes it can be bought by someone wanting to buy it and review it.
What is funny is one of them people has posted publicly leaving for vacation being so excited. Hmmm, afraid of a boogie man hearing their plate yet positing true name on social media with their home, job, vacation plans out there, ya. Go figure.
A true dispatch also knows unit to unit most time is faster
along with hearing other entities by them.
Isolating self without a true key to key with fellow neighbors they'll figure out the pains later.
I've seen first hand a officer in a fight for their life while block over where two cities meet a neighboring unit sits idling hearing only his agency. By the time calls come in, dispatch hand offs, there is delays where seconds matter. only if agency A could hear agency b's call for help a block away. In this case in late 90s then officer was killed as his backup was a ways out. A backyard over at city limit 2 different agency officers sat shooting the barrel on life. If they only could hear the scan for help, and if dispatch was faster handing off, making calls, and public faster dialing in.
This example is true for not only that, but missing kids, abducted etc. People hearing.
Most respected agencies have dedicated channels for ncic, swat, sensitive dispatches.
I'm for encryption if the other agency can hear, first responders in surrounding areas. It also is easy to have channels for ncic, selective encryption. Unfortunately most is user error thus the need for strapping as I seen it.
Biggest problem is half dept leaks, information is leaked by dispatchers, officers on many events which I have also seen first hand.