Facebook has taken to "auto-nuking" accounts based on keywords in profiles, associations with other users who get booted, and probably some other factors as well. This isn't too surprising, given that there are hundreds of millions of accounts on Facebook. Below is one user account who got shut down, and it's not too hard to guess why.
However, we hope that some of the most alarming users are getting reported to law enforcement, rather than just kicked off Facebook. In the picture below, we have blacked out the face of the prepubescent girl, but we've left the user's comment about her unredacted.