What's it to you?
In addition to the beneficial environmental factors that come out of turning towards a trayless future, there are also some personal benefits. By not picking up a tray, students become more conscious about the food they are taking in the lunch line. Without a tray, students are more prone to pick up less food that they don't actually plan on eating. This ideology could help in preventing the ever-dreaded "Freshman Fifteen". Who would have thought?