When I was in college, a friend used to work at the Kentucky Fried Chicken, and she would take a clean garbage bag and LOAD it down with all the chicken, biscuits, all the other food that was left over, and would put it in boxes outside near the dumpster, but not too near it (obviously). We'd drive out there and pick it up and take it back to the dorm. We'd save it for the weekend, or just eat on it through the week.
High school: I'd wait to get my food at the end of the lunch hour because they would LOAD your tray UP with food.
I wasn't nearly as heavy as I am nowadays, though. In the past 2 years I've gained weight; not from quantity of food, but quality. That, and I quit exercising. This fall, though, I'm going to start again. Just way too hot now.
I think I need a Big n' Tasty, and some fries.