That's really our job. We as a collective, have to stand up to the disrupter's and show them for what they are. We do that, initially, by countering their points with facts and reasoned discourse. If they persist, we then ignore them.
The millions you speak of, if they have half a brain, can come to the conclusion that they are trolls, disrupter's, whatever.
Eventually, they will fade away on their own. If not, and they are true @$$holes, then the mods ban them.
Free and open communication and discussion of ideas, especially political ones, have always had this problem and always will.
That's freedom baby!
Borg?
What's you're assimilation date?