mistermack wrote:
By FAR the leading pattern is people under thirty, late at night, with four or more people in the car.
It's even getting to the stage where insurance companies are imposing restrictions on the number of passengers newly qualified drivers are insured to carry, after early evening. Newly qualified drivers are THAT dangerous, far more dangerous than someone who is a few points over the limit, tested at random.
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ie, one passenger only.
I'll approach this from 2 directions:
Firstly, a lot of what I read in Australia agrees with the thrust of your first point, that night driving, driving by young males (mostly in the first year of their license...), and driving with a group in a car, are very significant risk indicators for crashes, particularly when taken together. No surprise, in some way, when you think of the psychology of the demographic involved... In response, in Australia, there are restrictions to the number of passengers a 1st year driver may carry, and much of the TV campaigns attempt to reach just that demographic...
However, the fact that these are serious risk factors does not alter the clear danger from driving under the influence. (And by the way, your last sentence is a little strange; do you imply that "a few points over" is somehow different when not tested, or not tested at random?)
I prefer to restrict as much as possible the numbers of drivers whose reflexes have been clearly shown to be impaired by numerous scientific tests...