I was almost swatted once -- there was a knock on my door "Police! Open up!" and when I came to the door the police said they heard reports of gunshots from my apartment. What?? I let them in, they looked around -- I think it was an ex-gf but I can't prove it. They started asking me if I just moved in (I had a few months before). I tried to ask them who reported it, but they wouldn't say. I'm just glad they didn't bust down the door guns blazing.
It's a scary world out there.