Did you not read any the articles talking about Oklahoma and Okie Light back when schools started jumping ship?
Talk about head in the sand.
"Also, both schools will be tied together when it comes to making a decision about conference expansion."
http://athlonsports.com/college-football/oklahoma-ready-leave-big-12
Even recently it was discussed as an issue that would still need to be cleared up (if possible) before Oklahoma could do anything.
http://frankthetank.me/2015/07/29/big-12-expansion-or-contraction-watch-out-for-oklahoma/