I don't see any validity to your argument. You are trying to make a comparison of a sporting event to a normal place of business and the two don't and shouldn't equate. You are right that they have the right to do what they did. However, an organization with some class wouldn't have considered it. Besides, the reasoning for his removal, according to the lions was that signs are not allowed in Ford Field, yet some chick in a wheel chair with a I love Joey sign was prominently displayed throughout the game. Maybe we should kick people out for cheering and booing too, because I know if I went to Rogers place of work and cheered him, I sure as hell would have been tossed out of there quicker than Jazz gets tossed out by Judge Phillip Banks.
"If you are flammable and have legs, you are never blocking a fire exit"
-Mitch Hedberg