So...I know this email issue isn't a great move by Facebook, but aren't we getting a little carried away here? Isn't Facebook opt-in? If you don't like it, surely you can just leave?
It's the day when everyone is forced to have a Facebook account, etc, that's when we have to worry.
But at the moment, please put it in perspective. It's a dumb move, yes, and could have a legal issue, but it's no more.