I've been sticking my hand in front of my current light on oncoming traffic, because even pointed to the side or what not there is still the exposed light element. And that is what blinds/distracts, not the light itself.
But now (with the light covered up) I've nothing except a reflector (which is a hit/miss item), I've also hindered my own vision, and I've also now distracted myself or simply took my focus off other important things. checking mirror, listening to my environment, one handed control...
Besides the fact my light sucks, and leaves me swerving all to often at the last min. sure I can miss that road kill with the front, but often catch it with the rear tire.

My concerns, safety first... and then respect for vehicles (they don't deserve to be distracted either).

I am pretty much dead set against (over regulation and all that) but on something like this... I wish that America took more of a European stance on it. Or at least more Americans would be conscience of their actions.
Another pet peeve on the LED tail lights... Most of the $60 and under combo sets that have 3 LED's on the tail light all 3 blink. People can't judge time/distance/speed on a blinking light. So I run solid... I wish I had the 3 LED's for solid and then one minor less intrusive blinking LED for attention.