The answer to the question appears to be that everyone is a numpty driver at some point. Some more so than others.
I shouldn't be surprised given the make-up of posters on here, that having the wrong lights on, not indicating, being in the wrong lane and so on and so on are all numpty traits but slamming on the brakes for a speed camera isn't. Neither is driving over the speed limit. Nor missing road signs. Despite the fact that SafeSpeed agrees with speed limits!
The big problem highlighted here is that in the main you are (or think you are) good, safe and experienced drivers. You feel that the way traffic is controlled at the moment is wrong and you should be given more freedom to decide how you drive.
However you think a large proportion of other drivers are not good, safe and experienced. How are these people going to react to having more freedom to decide how they drive?
How to deal with it? Should they be taken off the roads? Well, clearly that would be unacceptable publicly because they have had the right for so long, they (apparently) pay through the nose for it, and I'm sure if you asked them they'd say that they were good, safe and experienced drivers and it was everyone else that was a numpty.
Should they be educated? Well, yes - I think this is the answer. Education in two ways: firstly how to drive properly - as a good, safe, experienced driver would and secondly to obey the existing laws and rules of the road. If you want them to choose the right lane or have their fog lights off in the rain you also have to get them to obey road sings and speed limits. I don't think picking one aspect of driving and saying "you choose" whilst picking another and saying "you don't choose on this one" is a good approach.