College Dining: An Eat-More Environment?

I had lunch today at one of Cornell’s brand-new undergraduate houses where 350 sophomores, juniors, and seniors have a meal plan that allows unlimited access to meals prepared in cafeteria as well as to snacks supplied at an all-night canteen. Unlimited access means that students do not pay for each item. Instead, they can eat as much as they want of three meals a day plus a late lunch four days a week, plus leftovers and snacks at night. For lunch (modest because it’s only the second day of classes), we had a choice of hamburgers, chicken burgers, fish burgers, or fish for sandwiches with lots of fixings; a salad bar; French fries (heavily salted); two soups; a fruit bar; and a bunch of baked desserts. In case that didn’t do, students could also do the bagel bar or make their own peanut butter and jelly sandwiches. Cornell students have one healthy advantage; the campus is huge, these dorms are on the downhill side, and they have to hike uphill to get to class. And, of course, they are young. But I wonder how they figure out how to manage portions and calories in this kind of environment? Anyone have any idea?