I always think of a video that we were shown in high school (think it was a business studies class)... it showed the slaughter houses where they put all the cows to death for the hamburgers. They had them on a conveyor belt and just shot them in the head when they went past. Then they showed all the butchering that they do to them
Was awful... big part of my decision to become vegetarian!
Anyway, the point is, I always think of that video when I go past a Macdonalds shop... and it really makes me not want to buy anything from them ever! I feel bad even going in there for a coffee or a diet coke (only things I buy)