Unless someone does something really-really-really-really stupid or ultra-ultra-ultra-ultra dumb, I, for the most part, agree with the general sentiments of the Internet that victim blaming is bad.
Sure, you might be tempted to say something like “That’s why you should always lock your car door” to your neighbor after a hack thief pilfers through their unlocked car at night or “That’s why you shouldn’t play with fireworks” after a friend blows his thumb off with an M80, but no matter how at fault or directly responsible the victim is for what happened to them, you should never blame them for it, primarily because angry people on the Internet say you shouldn’t.
That logic holds doubly true when the people truly are innocent victims, like – for example – the father of a kid who was beaten and abused at school thanks to sicko football coaches and then reported it to school officials.