Breakfast of Champions

I just got back from a camping trip.   This morning, I watched a severely overweight man consume a two-liter bottle of Mountain Dew as breakfast.

What is wrong with people today?   Doesn't he realize that is a horrible diet that has already lead to severe obesity (we are talking 100 lbs overweight) and will, inevitably, lead to diabetes, heart disease, and death?

Or is that "telling people what to do"?

I just don't get it.