So, all I have to do to get you excluded from the group, is to report feeling oppressed and de-energized every time I interact with you? Awesome!
I better start now, because I suppose this game has a strong first-mover advantage.
(Note: The example is fictional; I actually like you. Also, I understand that there are people who really make other people feel bad, and it would be great to remove them. I just predict that if this is made an official rule, some people will abuse it. Will there be a meta-defense of saying: "I am really scared of Joe, because I noticed that when he does not like someone, he reports them making him feel bad, and then the group punishes the person, and I'm already afraid to speak my mind about something I know Joe would disagree with."? And of course at the same moment Joe says: "Viliam, this was really cruel, you made me cry. Don't ever say anything like this again.")
http://blip.tv/tech-love-live/osb09-donnie-berkholz-assholes-are-killing-your-project-2464449
This is specifically about why it's important to get assholes out of open source projects, but it applies in general. It includes an analysis of the social cost of keeping people around who frequently make other people unhappy, and in particular a way to balance the social costs (distraction, people doing much less work or leaving, useful volunteers not joining, assholes recruiting other assholes, etc.) of assholes against the useful work some of them do.