One naughty food outing in a blue moon isn't going to kill a person, so I'm not going to feel guilty about it. I'll just be good the rest of the week.
The thing that gets me is that there are people out there who eat almost nothing but fast food every day. Aside from the cost of going out all the time, I can't imagine the calories and fat they're consuming. I rarely eat fast food these days- I prefer to cook for myself so I can control the ingredients. Uno's and other "bad" food is a treat, something I do once or twice a month, if that often.