I found an interesting idea!
"System "AntiTrolls" In short, the point is that when a person is bathed his account is not blocked, he can read all messages and write answers to them, but his messages will not be seen by anyone. Thus e. he "participates" in the life of the forum, but all users ignore it for quite understandable technical reasons. Unable to withstand complete indifference, the troll goes away." (c) Zeratyl