Yeah always lock your pc when at a lan party, I found i nice porn background when i came back once :-/

This is one of the rites-of-passage at university these days; if you are stupid enough to leave your laptop on when going to the loo or something without locking it, then you deserve to be "fraped" (facebook raped) or have your history trawled through. Additionally, you have to learn to do it to others without being afraid, and know to cover your tracks so that your victim doesn't know it was you.

The usual facebook ones involve changing the profile pic, gender and orientation or posting something disgustingly TMI, but those are obvious. My favourite is to change their birthday to tomorrow so that people spam their wall with birthday wishes for a day that isn't their birthday. :)

they will find porn

I've made the same mistake, hahaa. I had a lot of explaining to do to a lot of people on many chat clients.