It's hard to see how that would work in his case, however, because of his stubbornness and unwillingness to consider that he may be wrong . ( As shown by comments like this . ) Equally, topic bans would probably not work, unless they managed to cover all his areas of interest . ( All articles with diacritics, all articles that refer to UK countries as countries, etc . etc . ) It's hard to see beyond a complete block on all articles, until sufficient time has elapsed until he either matures or finds ways to use his time more constructively . . . . which may be quite a while.