When you order a sandwich they push the supersize option on you with the reasoning that it's cheaper to order a big drink and a big order of fries with the sandwich. I'm insistent that all I **want** is the sandwich -- which is all I ordered in the first place. Why should I want to pay whatever cost for things I don't want, and will most likely wind up throwing away? But I guess a lot of people are swayed by the cost factor to order the full meal when all they really want (and need) is a sandwich.
(That said, I can't remember the last time I had anything from McDonald's or any fast-food place, other than a drink and I was out and about and thirsty.)
You **can** eat out...you just have to plan ahead.