It's a well recognized term, although not yet in the Oxford English Dictionary (the new edition will only be available on line).
However, it need not happen. Your settings can be such that only your friends can access your site, you make sure you actually know your friends (it's said that 150 is the maximum anyone can expect to realistically retain as friends) ,only you know your password, and report immediately any loss or theft of cellphone or any other device with access to facebook.
