Not to mention there are times where names/DOB/SSN are mentioned over the air which most people shouldn't have access to and sometimes violates HIPAA. There are people out there that don't even listen to the department or live close enough to but will cry just because there's an "E" listed. And to those people, I'd throw on encryption just to spite you.
EDIT: Just wanted to add, 99.9% of people that are carrying those radios don't know what their radio is. All they know is they flip a switch or change a zone as they were instructed. They don't know that it means they are encrypted and if they were gonna say something stupid before, they are still gonna say it.
I'm just gonna leave this here...
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