Cyber-bullying isn't a joke or a "fake term" made by "weak people" on the internet. People on the internet can and will destroy your life giving the slightest chance. Social sites hold a lot of power, and a mob mentality is a very dangerous thing on the internet. We should all be careful to not end up in it.
Context matters. When we don't pay attention to it, it can change the entire meaning of the situation. --- I've been looking up what Jon Ronson says on a lot of issues. He gives an interesting perspective on things.