Punishing the victim?

I was answering the thread about gangstalking and suddenly wondered: why is it common to punish the victim?

I’ve seen so many cases where the victim ends up getting the blame for something they couldn’t help. Bullied kids should be stronger, dress more appropiately and lose weight. Rape victims brought it on themselves by wearing mini skirts or behaving in a slutty manner. Victims of sexual assault on the work place must have made it up or be lying.

Did anyone see this happen too? And what are your views on this?