I'd stick with anonymous forums like this one. There are a number of other ones out there that you can join as well. I don't think it is worth sacrificing your privacy in order to join a facebook group. Facebook has been hacked over and over and over again, and all it takes is one mistake on your part in posting or in your settings for your disorders to become public knowledge. Heck, facebook is constantly changing their own settings, and you'd have to be SUPER diligent that everything remained private in order to ensure that nothing leaked out, but even so, that's no guarantee. And no, its not a good idea for your disorders to be out there, because even if you aren't ashamed, the world can be a very cruel place and future employers may not hire you if they see you have a number of mental disorders. (That's not exactly a legal reason to not hire someone, but of course, they'd just tell you that you weren't a good fit or whatever.)