The main problem with McDonalds - apart from the ubiquity of its horrid, plasticky outlets, that is, is the BLANDNESS of the food. Quite apart from any concerns about its nutritional value, it tastes, to me, of NOTHING - a mouthful of cotton wool would be tastier!
Nevertheless, even if they served the most sublime, gourmet dishes ever, I still wouldn't eat there - I just can't stand the thought of giant, monopolistic mega-corporations taking over the world ... local is best, down with mega-corps!!!