Welp, all my friends have my phone number, and one of them threatened me to put it on flyers and hang them around the school unless I paid her not to. (I told her that I wouldn't pay her but I would keep HER phone number a secret XD) not sure if you consider that blackmail cuz wasn't really, since I figured out a way to get myself out of it. Another time somebody found out about one of my online accounts, and made me pay him 2 bucks per day otherwise he would let my parents know about it. That kind of stuff, nothing serious.