Wowww. I wasn't gonna post mine, because I felt it was really dickish, but you've allowed me to do it now. When I was 13, there was this kid that I, and my friends, really didn't like. And his mom was a SUPER BITCH to all the kids in the neighborhood. She would SCREAM at us if our foot touched a blade of her grass while we were playing in the streets - that kinda stuff. God forbid a tennis ball ended up on her lawn from playing stickball. She'd lose her shit.
But anyway, he left one day to go to the arcade in the mall on his bike. Dick that he was. So after about an hour we went inside and called her house. I got on the phone and fake cried the following: "Mawwwwmmmm (crying) I'm in the Coral Springs jail right now because I stole (crying) - I stole (crying) - I stole (catching breath) - I stole a penis magaziiiiiiiiine (crying)." We thought she was gonna immediately out us for what we were doing, but she was legitimately shocked and started freaking out. "Stay right there! I'm leaving right now!" 20 seconds later she's running out to her car and screeches out of the driveway.
Once she found out and returned, she accused everybody in the neighborhood and visited every house to talk to every parent. Obviously she couldn't prove anything, but her hatred for us went up 10-fold after that.