I don't doubt that GW sent that text to Vitt, but I have trouble believing that coaches from 25 other teams actually called Williams to say, "We do it to, take the fall for us." That makes little sense to me.
Makes perfect sense to me. If you see someone dropping the hammer for something you're doing, you want another guy to take the fall and take the heat off you. The NFL had him over a barrel, the other coaches say "Hey, I know this sucks, but take one for the fraternity and we'll make sure you get a job when you come back."