Analysis of information sources in references of the Wikipedia article "Shadow banning" in English language version.
So one of the things we did in FogBugz to solve the problem of how do you get the person to go away and leave you alone is, well, you take their post and make it invisible to everyone else, but they still see it. They won't know they've been deleted. There's no one fanning their flame. You can't get into a flame war if no one responds to your criticism. So they get silenced and eventually just go away. We have several ways of telling if they come back, and it's been proven to be extremely, extremely effective. Say a spammer posts to your board and then they come back to check if it's still there, and they see it—to them it's still there—but no one else sees it, so they're not bothered by it.
