I hear ya Mike,
We are on facebook as well. Now Lil Queen has me playing Yoville with her on facebook. She is a shopaholic so that game is right up her alley, as she gets to buy stuff. Luckily so far, it is with game money and not real green backs, but she notices the really good stuff requires you to buy with real money.
So I am biting my tongue and putting my foot down. Saying NO! just play and buy the stuff that doesn't cost me anything.
(keeping wallet close at hand)