Homeless people are generally despised by everyone and had not this made it in the news, everyone would have looked the other way. It's like we've got to a point where kids are callous. In China, a kid, 10, tried to murder someone because the tools he was using were noisy [and distracted him from the video game he was playing].
A workman nearly plummeted to his death after a child cut the ropes on his harness because he was "noisy"
I think all these games kids have been playing make them think that they can do the same thing in the real world and get away with it.