I have a completely untested theory that bets move our way a disproportionate number of times because of our large fan base. I feel like opposing fans, casual fans and even some Illini fans REALLY underrate how many Illini fans there are. While our fan base size seems to ebb and flow more than a school like Iowa or Wisconsin, the TV ratings, alumni base size, state population, etc. back up us having a very large fan base.
Unlikely, you can't even place bets on Illinois if you live in the state.