I've been next to someone who enveloped the arm rest and oozed into my personal space. They also had possibly the largest laptop manufactured, with the screen at maximum brightness, watching shitty movies through the entire overnight flight. Also, Dorito breath.
Probably for the best that the experiment didn't work. I shudder to think about the amount of methane being released into the atmosphere if the entire homeless population was living on nothing but turkey chili.