While reading the book Fast Food Nation my eyes were opened to quite a few their business practices and lack of ethics. Did a little more research here and there and have been totally disgusted w/ McDevils ever since.
Other chains definately have issues too. Some work harder thans other to do whats right. Their are a handful that do get my fast food dollars from time to time. Chic-Fil-A being at the top of my list and one the very best out there.