I worked in one place where someone kept messing with my food in the fridge – cheese squeezed hard, apples bitten, bread torn, etc. got really annoying, and my boss was totally unconcerned.
Then one of the young admin/service girls admitted to her (gossipy) friend that it was her, so I found out, as did the rest of the office. No reason was given, but she was a total idiot, so one wasn’t really needed.
Again my boss was totally unconcerned, even when I put in a formal complaint.
So it was unfortunate that all of her records and data for a whole month became corrupted/lost/wrongly entered, and she lost out on her yearly bonus. There was no connection to me being the database manager, oh no 😈