> they would have to do it at a station, where they could immediately get off the train. I think, though, that this would be risky, given that subway stops generally have a lot of people getting on/off the train in the first place. I've seen a phone jacking in this exact scenario and nobody moved to stop the guy running. Nobody on the train can help cause the doors have closed, and nobody on the platform has any idea…
True, but a laptop is much more of a hassle to quickly grab and run with than a phone. What also helps is having one that's full of stickers or overall looks fairly (ab)used. A pristine MacBook is going to be much more of a target than a random ThinkPad with a sticker, greasy keyboard and 20 scratches.
It would be interesting to see if that would deter a thief.