Having now said so, if I get a reindeer poop catalog in the mail, I know where to point fingers.
I tend to think of the MeCha/MeFi communities as being safer and a cut above than your average forum, but a walk through MetaTalk archives made me feel like I was way off base with that.
Also, I've never understood what people think is so dangerous about others knowing their names and addresses. Really, it's public information, freely available at any library or town hall. You need a lot more than a name and an address for identity fraud.
There are accounts from users, found by searching for "address" on the MetaTalk archives, who have been signed up for white supremacist mailing lists or forums pertaining to embarrassing personal medical issues by others, particularly after contentious exchanges on the blue.