Propositioned on Facebook?

These are just spambots. Ignore them. Do not add them as friends or respond to them. They are scams to try to get you to go to a link that contains a virus and will attack your computer and send the same message to all of your contactcs. Or they are scams to get you to reveal your personal information, or to sign up for their webcam, or to make you go to some "verification" site saying they just need your credit card number but won't charge it, then your card is maxed out within 10 minutes