Neither should be banned. As far as I am aware, it is not against the law to avoid a DUI checkpoint or red light camera by taking another route. Ergo, there is no legal reason for which to ban them.
And personally, I think they're a fantastic idea. I'm try to avoid DUI checkpoints if I can, because I don't like waiting to go through them. And I absolutely despise red light cameras. They cause more accidents than they prevent, and they often times try to ticket you for something legal (like a right turn on red).