this video makes it look easy but there's a couple of things to think about: attitude and risk. If you look like you know what you are doing, people won't question it. i'm not saying that people always will, but a confident attitude and posturing means a lot. if you are a sketchy looking crackhead filing away at a bike chain and constantly looking over your shoulder, you are gonna arouse a lot more suspicion then someone who very well could be a city or building employee or something.

basically they've done a proof of concept, but unless bike theives all start getting balls of steel, you won't see any theif hacksawing a lock away for 8 minutes in broad daylight. well, you probably wont see many. a real thief has to worry about a few things that these guys dont: a) cops, security guards, and the like b) that the owner is gonna come back anytime now, and c) the off chance some bystander *might* intervene, or even if they dont, they might still be around when the owner comes back and starts yelling about his stolen bike. by nature theives are gonna go for the low hanging fruit most of the time.