"people are most motivated to write reviews when they are outraged. ...your site runs the risk of becoming a soap box for ranting."

There's a great big gap between letting all your angry customers (which hopefully you don't have a lot of) leave rants and creating sockpuppets so you have nothing but great reviews. The space between is the basics of word-of-mouth marketing: ask your happiest customers to talk about you.

No one is stopping American Eagle Movers from asking their happy customers to head on over to Yelp and leave them a review. They just don't seem to have any happy customers. So they have to fake it. And then Yelp steps in with their [seemingly] shady selection practices. Hence Justin's disastrous experience.