Because fatlogic. I think it has to do something with "the curve." They encourage others to eat shitty so that everyone around them is also a tub of shit. That way, no real work has to be done yet their appearance becomes more 'normal' and average. It's happening in the US all over. Fat is becoming the new average.  Also, since they are secretly all miserable inside, they want everyone around them to be miserable as well. Trying to normalize their disgusting attitudes and bodies through the law of averages.