Twice for me.
I was on my nightly walk and a kid in a car threw a rock at me (he missed). You may think that was trivial but I considered it dangerous and so did the cops.
As it turns out they caught them later that night. They were hooning in their car and got pulled over. The car matched the description I gave and the kid confessed to throwing rocks after the cops talked to him in the station.
Another time a Meat head and his girl friend came to my door late at night accusing me of calling the cops about the noise from a party across the road.
http://forums.pelicanparts.com/off-topic-discussions/575418-what-would-have-you-done.html