1) kind of already happens, they can mention but it's not linked, which is laughably enough to prevent a significant degree of mobbing by their own followers.

1) kind of already happens, they can mention but it's not linked, which is laughably enough to prevent a significant degree of mobbing by their own followers. 2) Someone in the atheist-skeptic community made a tool called the blockbot that ostensibly was to automatically block people from a list that you never want to talk to in the first place because the blockbot operator already identified them as trolls. Unfortunately the main reason was that the developer figured out that mass blocks caused an automated response mechanism to suspend that users. It was really an offensive, not defensive mechanism. This has been somewhat changed, but the reason I bring it up is that this has been tried by Twitter and unscrupulous people used it as an attack tool. 3) is similar to 2) but I suspect they are already doing this in some cases.