Is Yelp Fair to Restaurants?
Yelp. Sure. The people? Maybe not so much. You get fired, you make a bogus claim about this that and the other. I don't read Yelp. I talk tableside, and that's not arrogance, that's Biergarten etiquette.
Everyone knows that the posts on Yelp are padded both positive and negative. It's a good base for seeing what a place is about when you read the four-star reviews. 5 and 1 are a waste.
Yelp is like a cross section of humanity -- you get all types of people. But it seems to favor attention whores who make egregious statements to make themselves sound witty.
It's case by case. It's important to remember that the people writing are not professional food critics and that everyone's tastes are different.