Yes. I root against every conference rival in every game they play in or out of conference because I don't like those teams. If A&M was playing USC, I'd root for USC and I don't like them either. Any team that matters that year is a rival and I want to see them get beat, if they suck I don't care if they win or lose. I'm not cheering for Iowa St regardless of the opponent, I wouldn't even check the box score.
Everyone else I know feels the same way, it's only the PAC and SEC guys that seem to do this. I don't care about about rankings. If Texas wins they'll be ranked appropriately. USC had no problem with rankings for a decade in a s**tty conference.
And look at recent history as far as BB: Texas, A&M, OU, Baylor, and Mizzou have all been good teams, it's far more than just Kansas that's half the conference with good teams. In fact we just shipped the 2 crappiest teams out, it's a very good BB conference. You don't seem to know much about the Big12 if you think Kansas is all it has. You "guessed" final 4s was a good gauge, doesn't mean it is. It measures 1 good team, not a conference. Memphis made a bunch of good runs, how good was their conference?