If anyone ever did that to me it would also inspire me to get the word out as much as possible in the area. Probably plastering the roadways with signs and Facebook, twitter campaigns to make sure that restaurant gets as much bad press as possible.
However, because the owner actually helped me in my case, I encouraged everyone I knew in person and digitally to eat at that restaurant.
It was at a bar/restaurant. Much of it was server error - our salads arrived roughly 60 seconds before our meals (however much time it took for her to walk back to the kitchen and retrieve our meals.) That left me pondering whether to allow my food to cool so I could finish my salad, else save the salad for dessert. Our appetizers didn't come until several minutes after our meals were served "oh, they're almost ready" = "wooops, I forgot them." Had to ask for drink refills. I can forgive the restaurant for that - that's the fault of the server.
But, there was a band scheduled to play 2 hours later. Not a big band, with tons of stuff to set up, more like a decent garage type of band - their setup had to fit in an approximately 10'x15' area... the area we were occupying. The *owner* assisted and directed them clearing out that area; there were a couple video games against the wall that were being dragged past us while we were eating, the door was propped open (many of the other customers were in snowmobile suits - they had ridden snowmobiles to get to the restaurantl, i.e. it's cold outside) so they could move stuff. This was when we were about 3/4ers finished. They couldn't wait the 5 more minutes until that section of the room was empty.
My wife ordered chili. Ever see chili or other ground meat types of food that have been reheated and kept hot for 6 hours a night, 7 nights in a row? It was very clear that this stuff had been. It was disgusting. Cleverly hiding it beneath a layer of cheese didn't help. My son, who loves burgers, got a cheeseburger. Or rather, half of one. Our dogs got the other half at home.