Facebook is a page that we really shouldn't have an entry for on atheismopedia.
Facebook is famous for helping us network better while simultaneously accomplishing much less. Some people have lost their job for talking about their job to their friends (on facebook).
No matter what you ever write on facebook will always be available for someone to find, even if you delete it. Some people have said that Facebook sells info to spies, or that spies can hack the system and get anything you've ever written. So stop doing shady stuff... like atheist activism. They're watching.
You could always support the hard work of an atheist website. Some of these atheist sites generate revenue just by you visiting them! Try visiting 1 or 10 of these atheist sites.