Even on his group where he has full admin control, most people just ignore his posts and scroll right past them anyway as they're very boring and repetitive. Most people only stop to read if they see it's by someone else, someone normal and it's about something different than the usual, which is maybe a couple of times per week at most.
I can't get my head around Twitter. I get the point about how it forces people to be precise, but people with ideas that aren't just a repetition of the usual conventional viewpoints will need more text space. I think a coordinated use of different mediums (e.g. a blog where you can put a more lengthy text) with Twitter as the sharing platform may be an idea, but I personally have very little interest in politics. It's just a suggestion for those who do.