So let's say that you have reconnected with a friend from your childhood. His current girlfriend is a bit on the crazy side and thinks there is something going on between the two of you. Out of respect to your friend and his relationship you have broke contact but the girl has started to harass you online and through the phone. You're looking for petty ways to get back at her, the only contact information you have is her phone number - what would you do with it? Hypothetically.