I saw a more detailed story someplace else. What they were doing was putting several of the same items on one plate, like 5 crab ragoon, 3 egg rolls and a couple spoonfuls of sweet and sour. Then they would take a couple of bites of one piece and then go back and get more of the same. They did it over and over again each visit, so the owners started to recognize them. It was blatant wastefulness for no other reason then because they could. (If they thought the food they got was 'bad' that often, they should have started going to a different restaurant.)

With that information, I don't blame the restaurant owners at all. And as a potential customer, I'd prefer they kick folks like that out then raise the prices.