So, unless I’m misunderstanding this whole groups thing on Facebook, it seems that you can now (1) create a group and (2) “force join” people. There seems to be a “leave group” option, but still – shouldn’t this be an opt-in thing? One can only imagine the mischief this sort of thing invites (providing, of course, that my understanding is correct).
UPDATE: Many thanks to Amanda Conley for bringing this article to my attention.