Yeah, I was thinking that theres alot of spammers out there. Theres a way to totally stop comments to your profile, but then no one, even your friends, can talk to you. I was thinking of a way to 'block' users from posting on your profile, so that you can just 'block' spammers, and still talk to friends.
From a web admin point of view that would be a real pain in the neck. It would be easier to just make it harder for people to post comments on your page with a confirming captcha or something of that nature.