HID's have been on the market for the best part of ten years now, I am not certain if the recent upsurge in unfocused bright light syndrome is down to just HIDs, a lot OE units (Audi for instance) are LED.
Something we cyclists are guilty of as well.
I use a Seoul emitter LED light, I know it's going to dazzle if used in the wrong circumstances so it's backed up with a less full on headtorch. I often pass the same guy on my night loop down the lanes who has all the team kit and strangely a very clean/pricey full sus MTB. He is running something like a Lupine or Lumicycle system and he never runs it in the dipped positon, he uses it as a daylight running light as well.
It's pretty anti social even to other cyclists, I have seen him negotiate one junction with it running full blast and drivers are getting it full beam at almost point blank range in the face as they pass him going the other way through the junction, someone is going to hit him sooner or later and it's going to be his fault.
