I think this is typical of most people's experiences in a dormitory. The food in the cafetaria just never taste like the food you get at home!
So what this student and his friends did was to begin to support the local pizza shop. And the evidence is put on display in their room.
I wonder what kind of bacteria is growing inside those used boxes.
Perhaps the pizza shop can thank us for our patronage by sponsoring a flat screen TV for the dormitory :-)