I would stress how the claim is contested and by whom. I'd love to see a credibility network distribute this problem across its users, but I know there will be unforeseen problems. For example dissenter.com currently has a comment on itself that 'The sanitization of internet is a crime against humanity...' I sincerely hope this is satire, because it's well known that comment sections can be unsanitary.
I'm not sure I approve of the social contract in an algorithmic tutu. That's what I'm getting from this anyways; An algorithm to recommend who should partner up for group projects. I'd love to have a magic bullet too, but an implementation without clear justification sounds similar to brute force search to me. Force may be necessary anyways, I just want to clarify my first point.