Re: Motorists stay clear of North Wales
"But, as is quite evident, there's an endless stream of idiots all too happy to follow them. So, my point: how do hidden cameras help deter dangerous driving and/or speeding? "
Well, it would increase the likelihood of detection significantly - and that would mean that people wouldn't expect to get away with it.
It wouldn't take long for people, even the idiots you reference, to work out that if they speed then they *will* get busted, and therefore pay the appropriate price.
At that point it becomes an easy decision NOT to speed.
Currently the chance of detection is so small that there is no deterrent value.