War on obesity?

Consumerfreedom.com has a post about health paternalists that want to mandate labels on seemingly everything that has to do with food. I guess this is part of the whole "war on obesity" trend. Unlike the FDA, I trust people to decide for themselves what's best for them and what's not. Why is it any concern of the government if someone wants to get fat? Is it not possible that there are people out there who don't mind being a little overweight? I certainly enjoy junk food every now and then.