I only worked restaurant kitchens but loose clothing was indeed a hazard around doughmachines, icecreammachines, anything large with moving parts, it probably is less of an isue at a McD, last time I've been was 2006 though. Probably not so much around fryers but I am not sure. I've also seen a shirt caught in an ovendoor in a hotel I worked at, it was a big one you could stand in, this girl had her face blasted with superheated steam, skin bubbled up, really nasty. It will go back to normal after a few weeks but much puss formed. They were even stricter on clothing after that.