When I first registered with Facebook, I read that they sometimes remove our profiles but then I have a friend with multiple profiles that he uses to level up his game characters and even though I told him that he risks getting his account banned, he said that Facebook would have to proof that he has violated their terms of use.
As far as I know, Facebook strives to create an online social community of real people using real names and profiles. Those who use nicknames or business names are deleted.
Well, the thing is, as long as our profile and data are in a public domain, we risk getting them deleted without prior notice. Just take a look at Yahoo! Profiles and AOL Hometown. They don’t need to give us a reason and no, they did not.
The only way to safeguard our data is by hosting it ourselves and that also we need to backup our files regularly. Our hosts won’t take responsibility.