Everything that I share on my Facebook page are the kinds of things you would know about me if you met me at a party or something. My photo albums and notes are tweaked for specific people or groups of people, but there is no information on there that I wouldn't shout from the rooftops anyway, and certainly nothing "secret" that I would be worried about getting in trouble for (not that I ever do anything like that, I'm an absolute goody-two-shoes and would never even do so much as jaywalk
). Also, I check my credit report for strange activity, but my credit score isn't that great in the first place so no one would get very far with it even if they did try to steal my identity.
So to answer your question - I'm pretty laid-back about adding people, but I do treat it on a case-by-case basis.