The answer is ABSOLUTELY YES! Parents who let their kids get obese are clearly endangering their lives. There's NO excuse.
Should Parents Lose Custody Of Super Obese Kids? : NPR
Just think about it - once you become extremely morbidly obese, you will NEVER have the great body you once had. Never. You'll have a lot of baggage around (even with plastic surgeries) and your fat cells retain memory. You'll have constant addiction to food. It's disturbing to see how kids are getting really obese and their parents don't do a thing about it.