So, I received a dreaded Facebook invitation from someone I haven't seen in ages, probably let FB scan the whole contact list. No, I don't want to join FB. There is a link at the bottom which says "If you do not wish to receive this type of email from Facebook in the future, please click here to unsubscribe". What do you guys think? Should I click this "opt out" or just mark the message as spam? Yes, it's a legit message from FB. Gods, I don't understand why people do this. Now FB has my email forever in their database.