First, I completely agree with the problem of just changing bulbs and the problem it causes.
That said, I have a 2013 with factory HID's, stock height. None of the Ford truck's auto adjust the aim of their HID's to my knowledge. Most of the time I don't get a flash, but sometimes I do. My wife and daughter both have commented when I am behind them how bright the lights are. People flash because they think you have your high beams on. I wish people would realize that if you also see their fog lights on, (which I have on if my headlights are on) unless the vehicle was made before 1980, was modified or the fog lights are after-market, then you cannot have both on the same time. Fog lights on = no high beams, so don't bother flashing me because I am not turning my headlights off. I think this applies most of the time. And fog lights have no effect to oncoming traffic since they are aimed low and wide.
Also, the HID's are more irritating to your eyes not as much because of their brightness but because of where they fall in the light spectrum. More towards the blue end is more irritating.
I am not defending those that have changed their bulbs, I am speaking as an owner of a stock OEM vehicle with HID's. I bought the truck, I didn't design it. It gets irritating when I get flashed. HID's and LED's are the future, they are not going away. I don't flash my high beams unless someone is really persistent in trying to tell me, them they get a quick flash to let them know mine are not on.
And, auto aim systems should be mandatory. Which may help with some of the problem.