MB:
Over here, employment isn't a right; it's a privilege. And to do things that make your employer look like a bumbling redneck bafoon? Great way to get the axe. Taking pictures of a cute waitress with your issue weapon the back of the squad car after having a few beers shows poor judgement. We're not talking about private pictures on a private vehicle here.
Personally, were I the Sherrif, I'd probably have charged them with misuse of county property or some such other charge.