Can you do it? I've heard of some people using Facebook, Twitter, LinkedIn... pretty much anything in order to check up on tenants. I know employers do it, but what about the legal reprocussions? If they have stellar credit, but their facebook shows them to be a big partier and you're worried they'll disrupt the tenants, is that a valid reason to turn them down? Can you even bring that into the conversation? I feel like it'd be a great asset to use, but it also worries me and feels a bit intrusive as well. Any thoughts?