>Yes, it is every ad network's right to refuse to associate with Breitbart or anyone else for that matter. But is this really the direction we, as a society, want to move in?

Yes, this is the direction we as a society want to move in. The opposite direction from hate speech. A direction in which large commercial ad enterprises do not support neo-Nazi content and do not support neo-Nazis making a lot of money off said content; at least not on AppNexus' dime.

This is precisely the direction we want to move in.