I don't think you have to send that email to everyone. I've always managed to get out of it when I've encountered windows like that.

Facebook, right now, is a lot better than Myspace imo (cleaner look, less junk, no required "Top Friends" bs), though the mini-feed still kind of worries me and the applications make it seem more like Myspace (though some of them are really addictive...) -_-