Talk about someone obsessed with wagging their 'little dick' around! Maybe the 'kid' doesn't take this post so seriously that they bothered writing at all carefully. What's wrong with you that you do -- Is this stuff your whole life, that you can get so insulted? Why are you so threatened by someone you believe to be 15? You certainly haven't justified your exclusive assertion to speak as an adult here.
I'd guess that your eloquent 'shut the fuck up' just isn't 'sharp' enough to hurt whoever knifey is, being -- we'll assume -- the average human being, and thereby a bit more -- lets say --advanced than you. On the other hand, knowing you exist is a bit painful in itself.