AN EXTRAORDINARY ACT OF CIVIL OBEDIENCE: Some Atlanta students drive the speed limit and videotape the resulting mayhem. As one of them says, "I'm just glad nobody got hurt. It had the potential to be dangerous, which was really, again, the point. We were dangerous because we were obeying the law."
UPDAE: Alan, Esq. thinks that this was against the law, and there's an interesting discussion going on in the comments with some of the students.