Fans throwing beer again?

Near the end of the race after Kahne took the lead the female reporter said that someone almost hit Kahne with a beer bottle (Trying to hit Busch, probably)...how long do you think it will be before NASCAR revokes beer drinking priviledges at the track? Busch didn't even win, obviously the fans doing this don't realize how dangerous it is, or don't care. Maybe NASCAR will step up soon enough before it get's out of hand...did anyone else hear this and what's your thoughts?