Quite honestly I don't care if the customer programs or not. I have a backup...
Well, I for one don't need the panic call while I'm in the middle of another job 50 miles away because some twit tried to change something and something no longer works. An ounce of prevention is worth a pound of cure.
I just don't understand it. We go through training, certification and have years of experience. I can't fathom why some people think all they have to do is look through a poorly written manual and they will know what to do. Ain't going to happen folks.