How would numbered tickets even work? Wouldn't people just show up early, get their numbered ticket, leave and then come back closer to game time?
Surely some AD somewhere has got this figured out. How do they do it with the Cameron Crazies for Duke?
One idea would be to do some unannounced checking of numbers (with a 5 minute warning for someone using the portapotty). If you aren't there, your number gets crossed off the admission list.