[jfager]

Being able to switch services or rent someone else's credentials are different problems than being able to cheaply create a new positive profile on a given service. Switching doesn't help you much if there's one dominant dispatch service that everyone uses, and renting someone else's credentials drives up the price of scamming the system.

This is kind of a silly argument, though, because my main point was actually agreement that a taxi review system would probably be horribly broken. I just don't think it would necessarily be broken in the exact same way that eBay's is.