In reply to AlanLittle:
> Drivers are at most "guilty" of using whatever headlights their car comes equipped with.
That's not necessarily the case at all: there are quite a few cars and vans being driven around with illegal xenon lights, aftermarket items which do not have the self-levelling mechanism specifically required to reduce the risk of dazzling other road users. There is also a healthy trade in aftermarket LED daylight running lights and the like, for people who want to have the "bright white" look rather than the perfectly functional off-white tungsten bulbs that their car came with. It's trivially easy to find replacement tungsten bulbs for head, fog and brake lights which either exceed the wattage limits, or have a higher light output for the same wattage.
All mostly done to "improve the look" of the vehicle - ie purely in the interests of the driver's vanity - but with the safety justification kept in reserve.
That's not to mention the lazy idiots who just can't be bothered to keep the aim of their headlights properly adjusted.
None of this justifies escalating the problem in to some kind of lumens arms race, of course.