Usually found at WTF, Welcome to Facebook, is a term first designed by Mark Zuckerberg himself. He made this shortened word to explain to people, "Facebook IS something different!" Give or take a few weeks, and people had turned its common use on facebook for bad. Thereby, turning..WTF... to What the Fuck, instead of Welcome to Facebook.
Dude1 - "Hey, where's Bob?"
Dude2 - "He got in troubl, because yesterday, his dad made a facebook, and he told him WTF, and told him that it meant "Welcome to Facebook", then his dad proceeded to message every one of his friends.... "WTF"!
Dude1 - "Yeah..... "