If you look at trip details on delta.dumb, just above the ticket number there now is a signup for Living Social email offers at your destination with your email address already filled in. It would be very very easy to accidentally click the sign up button (which looks very much like part of DL's website in design, font, and color) and find yourself on their mailing list. It really looks like DL is making these offers, not Living Social. There is also a space to fill in your zip code in order to receive "home" offers. I never noticed this before and I would be upset to have my email address given out to this outfit. Has anyone else noticed this or had trouble with it?