I'm that way with cops... 
Around here, firefighters are really well respected, when cops are a bit less... When the firefighters come people are like "Yeah the saviours are there!" and when the cops come it's like "uh, oh, BAD THINGS!"
Once I had this mod installed that allowed sims to make babies when I wasn't playing them. I returned to one family, only to discover that one of my sims had impregnated another of my sims from a different household. This was sooo wrong because they were supposed to each end up with different people. So I switched to the pregnant sims' household, aged up her baby, and trapped it in a room where it starved to death.
My other sim who never even knew his illicit lover had become pregnant mourned for two days 
Aaaaaaah that's good to be able to do this kind of stuffs in game 
"We are all killers, Alistair Artemis".