I agree with overselling to fill the section. It's simplistic to suggest moving them to a better section. Who wants to be the one to tell those fans they are moving? Plus, I'm sure on a per seat basis those other fans are paying more. It's a tricky problem, and it's certainly not one of NU's most pressing issues in the athletic department.
BS...I'm sure you won't mind the next time some lard butt takes half your seat then?