I think the legal definition of "manipulation" might differ from the "ethical" definition. What I think has happened here is that the court didn't find any "ill

I think the legal definition of "manipulation" might differ from the "ethical" definition. What I think has happened here is that the court didn't find any "illegal manipulation." The question of "unethical manipulation" may still be up in the air. The problem for Yelp is that it seems to serve as a psychological outlet for a large number of people. They're angry about something, it builds up, and they then take immense satisfaction in channeling it into a business review.