When you're on the freeway, and you see two people suddenly swerve out from behind you, make four lane changes, swerve in front of you, and make twelve more lane changes without ever leaving more than three feet between themselves and any other car, you begin to wonder at the sanity of such drivers.
There
comes a point, when you wonder... not only is it obvious that were anyone to tap their breaks, these other drivers would cause a massive accident, but maybe causing that accident might actually make the roads much safer and calmer after the fact.
Now we clearly can't have just any one vigilante cause such an accident. For one thing, few would have the money, and for another thing, with just one guy, the accident caused would lead to a massive multi-car pile up, where dozens of people would suffer injury and damage to property.
What if we get a large team of drivers. If a big enough team of drivers was on the road in unmarked cars, might they be able to simulate normal traffic, manipulate the car spacings so nobody but them and the dangerous driver was in a large space of the road, and have tow trucks and police at the ready behind them?
A massive accident involving hundreds of volunteer drivers trained for just this event would occur. The police and tow trucks would rapidly get the rubbish off the scene so regular traffic could commence again without too much hassle, and the dangerously aggressive drivers would find themselves in quite a pickle: No car, Hundreds of precision drivers capable of claiming massive settlement sums for insurance, perhaps a police helicopter which just happened to pass by to document their multiple illegal traffic moves just before the accident to prove that the dangerous driver was in fact at fault...
it all begins to smack of dystopia, but perhaps in certain situations such an act would be justifiable.