The same argument has been had on many motorcycle forums too. There is a contingent who ride with full beam on no matter what the time of day or conditions. "If they flash to complain, at least it shows they have seen me!" For some reason, far more US riders seem to take this attitude than Europeans. It seems very selfish to me. And, after all, if someone is driving towards you in a tonne and a half of metal, the last thing you want to do is blind them, in my opinion.
When I drive home in my car on unlit roads, I am frequently blinded by oncoming traffic using either high beam or overly bright LED headlights.
For a few seconds, I am driving practically blind.
For this very reason, I aim my LED bike headlights down and left. I'm only interested in seeing the road surface I am about to run my tyres over.
What I fail to understand is the logic of a front flashing light? I've seen loads of cyclists in the last week with a front flasher but I don't get it?
Traffic which is in front of me or coming towards me is not something which bothers me. Because I can see them, I can either take preventative or reactive measures to keep myself safe. I don't rely on them being able to see me.
You need to be seen from behind though so I understand flashers on the back (but I don't use them myself).
But on the front, you need to be able to see the road and I don't see how a flashing headlight achieves that?