I don't think it was really meant to prove anything. It was just humor.

That said, you'll notice from the video that most people won't steal an unattended bike. Those who do should be mocked.

I saw a show on one of the pseudo-science channels recently where they had hidden cameras watching to see how long it would take for someone to pick up a wallet left on the ground. It went quickly, of course. The really fascinating thing was that when they did it again but this time painted a red circle around the wallet no one even looked at it.

I agree that it would be fun to see this repeated with various types of locks.