Untrue. There are plenty of people who don't have the means to break pseudonymity but who would gladly torment, abuse or seek retribution for some real or imagined slight from someone they can easily identify by face and name.

And it's always worth making the truly scary ones work for it, because they're far more likely to go for easier marks first.

Note that the same logic applies to locking your doors at home. You don't leave your doors unlocked, right?