Living in New Orleans, I personally hate riders doing that - especially in the Quarter. It's a high pedestrian traffic area with narrow, poorly maintained streets. Delivery trucks, police cars and locals/tourists's vehicles all represent hazards that these guys are just ignoring. I've seen too many bike vs tourist accidents to admire these guys. It gives New Orleans a bad image.
There's another video from one of them riding the wrong way down a one-way street with traffic. Dumbasses.