Saying, "I didn't post that, it was my brother/cousin/dog/a hacker". You are responsible for controlling your own account. if( you re-use passwords on other sites or accidentally leave your account logged in on a public computer, you're just begging for trouble. Additionally, so many people have used that same excuse in the past when they clearly posted it themselves that it's hardly even believable.
I sort of laughed --- (\_/) IT'S OVER 9000!!!!! and I am 1337 (O.o) Put bunny in your sig, he must rule the world!!!