Last year I drove my parent's car which is equipped with one of these cameras that determine if the driver is distracted or dozing. And I can say for certain that it works. I honestly wish that my car had this sort of a system.

I view this tech like a padlock. Sure some people will do whatever they can to get around it, but it keeps honest people honest. If it can reduce deaths on the road from drunk and tired drivers even by a little bit then isn't that worth it?

I'm not sure what you mean by not being able to follow up... Driving drunk and killing someone is already punished harshly, and you can even follow up civilly; it's called a wrongful death suit.