By now, if you haven't heard about the restaurant Botto Bistro you have to head over and read their Yelp Reviews. Trying to achieve the opposite of the highest rating via Yelp!, owner David Cerretini is arguing that it's the best business move he's made in years. If you give it a 1-star rating, you get 25% off your meal to boot!
Here's a favorite review of mine.
Also, here's a pic of the board that they have up in the restaurant.
The whole story here via SFGate.