lifeguard at the cement pond
Forgot why I started mentioning this.I have never Twittered, but when I was lurking on the radical feminist group on Facebook a couple of years ago I would put people on block as soon as they identified themselves as being either obnoxious or retarded. By the time I was banned I think I had over a hundred people on block
The block function on Facebook, at least at the time, was extremely effective. I couldn't see them, they couldn't see me. They could see people responding to me in threads started by people other than me, but they couldn't see what I had written.