CAUTION - Extreme Vulgarity!!!
So, my friend Aimee recently wrote a really sweet birthday text to a friend of hers. The friend replied with a nasty barrage of insults and vulgarity, which Aimee found surprising, since her friend was usually very sweet. After sending an apology to the friend for whatever wrongs she might have committed, the friend sent her another barrage of insults and corruption, at which point Aimee realized that this person was not actually her friend, but a stranger who had ended up with her friend's old phone number.
So, out of righteous indignation, Aimee took to Facebook, and asked all of her friends to write a sweet and happy birthday message to this person, just to see what happens.
Needless to say, I did not hear from her again after that. :)