When I was going to college at UW in Seattle I often went to a cheap place familiarly called 'The Greeks' but formally the 'Olympic Resturant'. The food was good and the price was low. But one night about 3 years after I started going there, I glanced down at my salad and saw that it was teeming with maggots. A few more and they could have carried off the whole salad plate. It cost a bit more, but I ate elsewhere after that.