Seems like the world's most dangerous business to be in is the fast food industry. They get sued for some VERY stupid things that their customers do - best example the hot McDonalds coffee in the lap (nearly 20 years ago... crazy). Don't forget the finger in the chili that turned out to be a hoax.
The silly lawsuits continue even today with a man suing White Castle for failing to expand their booths. He claims he is representing not just himself and his 290lbs., but also pregnant women and people with disabilities who may not be able to use the "small" booths.
I'm no lawyer, but it seems to me, the booth may NOT be the problem.