I don't think that this phenomenon (lots of people watching a crime and not doing anything about it) is caused by the Internet. It's often known as the Bystander Effect, or <a href="http://en.wikipedia.org/wiki/Diffusion_of_responsibility">Diffusion of Responsibility</i>, and the most famous case in the US was the rape and murder of Kitty Genovese in 1964. Simply put, people in a large crowd are actually less likely to call the police or intervene, because they assume that someone else will do it. Probably all 600 YouTube viewers were thinking "someone else must have already notified the police about this," when in reality none of them had.

If this crime had happened in the US, where I live, and the rapists had been caught and convicted, it's possible that they would get the death penalty. Personally, I don't agree with that. The crime that they committed was terrible, but I don't think that killing them would do anything to mitigate the damage done to this woman and her family. I think that society should look for ways to rehabilitate criminals rather than simply punishing them.