At least that’s what Facebook says. It seems Facebook is making a public stand that they are a ‘social utility’ and not a ‘social network’.
According to a Blog post on TechCrunch, Facebook users’ accounts are being deleted and users are being told that “…Facebook accounts are meant for authentic usage only. This means that we expect accounts to reflect mainly “real-world” contacts (i.e. your family, schoolmates, co-workers, etc.), rather than mainly “internet-only” contacts. As stated on our home page, Facebook is a social utility that connects you with the people around you, not a “social networking site”.
As discussed in a recent blog post by WebProNews, it seems that Facebook is getting its feathers ruffled over a popular Facebook application called PackRat created by Alamofire.

In this game users gather, purchase, steal and collect cards. Apparently, this game is so popular that many people are making soaring amounts of ‘internet-only’ friends in violation of Facebook’s Terms of Use and quickly finding out that participation in the game has caused the cancellation of their Facebook account.
Who knew making new friends would get your account canceled?
That's kind of silly...it can be hard for an entity to control how users want to use it. Besides, how old-fashioned are they? People have been making friends and building relationships online that often BECOME "real life" relationships. Didn't Facebook get the memo?