I rode my bicycle to Eastern Market in Detroit over the summer and I was about to lock my bike up, when I saw a bike locked up lying down, so I put it back up as I did 2 guys said is that your bike, I said no I just thought I would pick it up, They said a guy just cut the lock off another bike next to it and took off. In a crowd of people a guy cut the lock off and nobody said a thing.
After that I just walk around with my bike, I have a bunch of bikes none worth too much, but I would hate to get stuck 20 miles from home without a way to get back.