Look everyone, how many times do you have to be told that the Internet is a very public place. If you’re gonna put something out there, you’d better damn well be prepared that it might come back to haunt you. And if you need to complain about your job, well, don’t do it on Facebook. Especially if you happen to be friends with your boss. May what happened to these idiotic people never happen to you.

And although this isn’t from Facebook, it’s still worthy of being in this collection: