When I was in college, the BK at the Student Center took credit cards. They were largely responsible for my graduating with a staggering $12,000 of credit card debt. (That is about 3,000 value meals.)

McDonalds is already being sued for allowing fat people to eat there. This will probably prompt lawsuits claiming that McDonalds is responsible for the mountains of debt people are accumulating. Spiking their goodies with pickles and onions only exacerbates the problem.