First, with all due respect, you would not. I know you think you would, but how we imagine we would react and how we actually react are two very different things. You will bottle up that anger and release it on some random man who does something you percieve as revealing that he is of the pedo nature, like looking at a kid for too long. You will call him names and give him a dirty look and if he is part of some social network relevant to yours maybe try to hurt his social status and reputation.

I say this because that is what actually happens all the time. No one has ever been arrested for hunting down one of these men by the parents of the kids they victimized. Those parents are more worried about not harming the kids sports careers by rocking the boat to even try to change the policies that allow that.

Second, if you are not doing anything about it now that is what your nature is. You are just not that guy or girl. Those people are at the school board meetings and council meetings trying to organize some push back and frankly not getting enough support from people like you who think "if it gets to x point I'll do something".