I probably misunderstood the rules. I was sure that insulting a user was strictly prohibited and the insulter should be banned. I was told in the past to avoid answering to any kind of provocative language and ignore any kind of insult. With my surprise I discover today that somebody can allow himself to open a provocative and insulting thread against people, suggesting same kind of illness and laughing at them, that cannot even answer to him, due to their status of banned users ! Which is really astonishing. Isn't it ?