Facebook Hacked with iPad Advertisement!?

[Tyler]

I just got on my facebook to see that someone has gotten on mine and posted the following on all of my friends' walls!
(Name) I cant believe it, I actually got a free ipad to test out and keep. I don't think this will last long, they are only giving away a limited supply so I would hurry. They are trying to get rid of them because the new iPad 2 is now out and they are overstocked. I absolutely LOVE it
What idiot is doing this and what should I do?!?!?
Thank you (:
(I haven't signed up to win an iPad or taken any goofy surveys lately so I'm clueless as to how they got onto my account!)