Anything you do on Facebook is owned by Facebook, including uploading pictures, blogs, videos, CONTACT DETAILS and a whole lot more.

I signed up for a Facebook acct., but I never use it.

I deleted mine but there is a catch, unless you go through and remove everything individually post by post they will keep it all on file. When you "Delete" your account it doesn't get deleted they simply deactivate it and all you have to do the is sign back to reactivate it. meanwhile they keep all data about you including that which they gathered from all and any other sources across the internet.

I've never had an account there, nor at twitter. Never will.