I read a post on a Realtor message board saying that an agent should check the facebook pages of the other party in a transaction to see if they can get any indication of weaknesses to be used in negotiations. Things like “our lease is running out quick” or “we’ve had our home on the market for 2 months and not a single offer” can be used against you.
I don’t use facebook but my kids do. There are ways of setting up your profile so only “friends” see your posts, not everyone.