It's striking that online commentary you can freely ignore is considered horrible, but overfeeding your own flesh and blood so he'll get diabetes and die young doesn't count as child abuse.  As George Carlin said, a 13-year-old kid doesn't have any money, so the only way he gets and stays fat is by his parents buying shit.  People with bad eating habits push it on their children, so I'd be very surprised if his parents weren't fat.