Those existed before this accident. Bonin pressed the priority button to steal control from the other pilot, who was fixing things, at least once, and "dual input" alarms sounded pretty much the entire time the plane was falling out of the sky.

The ONLY way to have prevented Bonin from crashing the plane would have been to remove him from the controls. He was doing the same thing that lifeguards are warned about; when the human brain is in that kind of panic state, it will happily do things that it should know will inevitably lead to it's own death, like scrambling in such a way that you drown the lifeguard trying to rescue you.