What Did SMU do to NTSU?

As a long time reader, first time poster, I guess my first would have to be a nagging question that goes all the way back to last September. NTSU seems to view games with us as a rivalry despite the somewhat one sided record, and I keep reading and hearing that we "stiffed" them and kept them out of joining a better conference.
So my question is, what did SMU "do" to upset all those JUCOers in Denton?
So my question is, what did SMU "do" to upset all those JUCOers in Denton?