I hate Facebook!
I hate it so much that I decided to close my account. Guess what? It's impossible!
At best, you can "deactivate" your account, but all your data is still online.
There is no button that you can click to simply close your account. You need to remove every piece of information on your page, then write to firstname.lastname@example.org or email@example.com and hope that someone will be kind enough to remove your data.
Now, I hate Facebook even more!