Yeah, the only analog bouncing around my brain are accounts like that one, and, say, SwiftOnSecurity. There are people who are really big within a particular niche, and become a "sun" within a solar system. I'm blocked from both of those accounts, but I don't know why. (It's odd, because I usually avoid strong comments of ANY kind). The net effect on this sort of behavior on traffic patterns at Twitter works out quite a bit differently than on YouTube. You probably wouldn't block people on YouTube for the same comment you see on Twitter, and when you do it on Twitter, you're hard-limiting your audience.