Yelp’s Reputation Management Problem

As some of you may already know this morning I was under the influence of Nitrous Oxide in a dentist chair. Before I headed off to oblivion I got into a discussion about local Web marketing with my dentist and his assistant.  His assistant relayed the following story about a doctor she knows in San Diego (I may have lost something in the translation as when it comes to laughing gas I am a 60%er):

A teenage patient wrote a bad review of the doctor on Yelp and you know how teenagers can be.  But because the teenager had a lot of friends on Yelp and wrote a lot of reviews, her review went to the top and stayed there.  And the other good reviews disappeared.  Yelp called him to ask if he wanted to advertise and he said only if they can get rid of the bad review.  They said they couldn’t do that.

To which my dentist replied:

What’s Yelp?