Not very smart. That kind of riding can get you killed, and at the very least it gives the rest of us a bad image. I think the cops should have shown more restraint in the liveleaks video, but the only bikers who were really at risk in that video were the ones trying to run.
The second liveleaks video looks cool, and I'll grant that some of those guys have serious skill. But the highway is still the wrong place to do that. I would never be videotaping any of that because I wouldn't want to be anywhere NEAR them. If the guy/girl you are taping loses control and lays the bike down in front of you, you are probably fucked.