For years Yelp has had controversy over reviews displayed and added to the system. In fact, recently they were sued over them.

In response to all the questions and legal issues, Yelp decided to make two changes.

(1) You can now see filtered out reviews
(2) Yelp is discontinuing the “Favorite Review” feature

Here is one comment from a WebmasterWorld thread on this change of heart:

Yes, this is a good first step for Yelp.

Forum discussion at WebmasterWorld.