> And then when Jane down the street starts talking about the need to kill "insert group here" well you know who they are and you can go down and have a talking to them or tell their employer, or whatever.

This works the other way too. You tell others online "hey maybe we should stop killing X people" or maybe expose that X people are being killed without the public knowing and the people in favor of killing X people can and will ruin your life.

We in fact saw more of this happening in the past few years than the opposite.