I'm a gubmint employee (Federal), so yeah, zero tolerance, but the person in question went to our boss about it and implied that I was creating a "hostile work environment" by having pictures of guns. She even claimed to him that she believed I was keeping a gun in my car at work, which is verboten (I wasn't, but that's how crazy this person is). I really had to bite my tongue on that one. Like I said, thankfully a position opened up in another department, so I didn't have to endure it for long.
Move her to where I work. She'd be screaming in an hour.