Okay, I love this! I sometimes think of it as a foreign language that only stupid people know. You know it's a sad day in history when high school English teachers have to specifically state the chat-speak is now allowed to be used in projects and essays. 'Tis even sadder when a high school junior (in Honors US History) must ask her classmates how to spell the word "because". I am dead serious, that really happened.
I'll admit, I do jokingly say "STFU, MOFO" - but as a joke! I don't LIVE off of it like most of my peers.