Yeah, the Russian trolls pretending to be "liberals" and constantly attacking only the Democrats for some weird reason are all over the place. And then there are the people stupid enough to fall for this nonsense, too...I know a few IRL, and man, they are so very tiresome.
Usually they have all kinds of excuses and absurd purity tests that no politician that is actually running would pass, and then they proudly do shit like stay home or throw their vote away on Jill Stein or whatever. They act like they won something by doing this, too.
But when it comes to the trolls and useful idiots, I've seen some places that seem to have been overrun with them. The comments on Boing Boing, once upon a time, used to be a pretty fun place. Some years go by and I come back later and try to engage in reasonable conversation and the little clique of self-reinforcing posters/ moderators that took over that place were having none of it. It was all maximalist identity politics and Oppression Olympics to the point of cartoonish levels, and constant ripping on the Democratic Party and "shitlibs". Any deviation, most especially if you made one of the anointed look bad? Deleted, almost immediately. Didn't matter how thoughtful.
Anyway, the comment section there seemed to be designed to create reactionaries. Anyone on the fence that happens to wander into some spectacle like that is bound to come away with some impressions about what liberals are like, and it's not going to look good.
They have since taken their comments behind a paywall, go figure. I hope that little clique is happy with policing any all minute deviations from what they believe is the One True Way to think. I doubt anyone is going to pay for that kind of treatment for long, so.... shrug?