I think it would be nice in a next release allow each registered user to can manage freely a own blacklist of the users to be filtered out when I touch "community tab". In this way we obtains two goals: the first is that everyone could automatically exclude from its own view who is here only to disturb the others, with arguments not strictely of electronic, or who publish many and many exercises taht could be done privately. The second is that knowing this, everyone will think more time before publish something, because he will know that the other will never see his words.
