Facebook is reportedly deleting numerous profiles of Second Life avatars on the social network. Among them is Angie Mornington, a well-known personality in SL, who recently received an email from The Facebook Platform Team, informing her that "Your personal account was recently disabled by Facebook." The message included a link, Ms. Mornington told me, and after clicking it, "I wound up at a page that said that in order to restore my account, I have to scan and upload a government ID showing my real name and photo, with everything else blacked out (social security number, address, etc.) I refuse to do that."
At the moment, however, there doesn't seem to be a thorough or systematic purging of Second Life avatars -- at least not yet. Over the weekend, I lost about a hundred friends on my own Facebook network, presumably avatars, but I still have hundreds of Facebook friends who are avatars. In any case, it does appear to be a substantial purge, and comes two years after a Facebook rep told me that while the social network requires accounts based on real names and/or identities, "[t]he vast majority of fake accounts on which we take action have been reported to us by other users." So it's possible that any purge is actually being driven by a rash of users filing reports against avatar-based accounts. Or perhaps Facebook is becoming more stringent about its policies in the run-up to their IPO.
In any case, if you do have a Facebook account for your avatar, there's a solution: