Install a light bar and flip it on when you encounter these people.
Intentionally blinding problem drivers, while emotionally satisfying, is likely to cause accidents, road rage, and is probably illegal. Blinking your high beams is the socially acceptable thing to do. Going too far beyond that is the optical version of coal rolling.
Intentionally escalating a situation on the road while making it clear you are doing it out of malice rather than genuine stupidity is never the right thing to do.
Sure you can probably get away with it for awhile but you're eventually gonna do it to a cop that makes it very much not worth your while or you're gonna run across someone who's reaction causes you serious bodily harm. It's just not worth it and normalizing that kind of tit for tat behavior makes the world a worse place.
Personally, when I see people beaming me on the other side of the road in a rural area, and I'm sure it isn't just overly-bright factory lights, I flip my high beams on and leave them on until they turn theirs off. I see way too many people on rural roads driving around with their brights on because they just don't care about other drivers, and prefer to leave them on. This isn't such an issue in cities.
I've really gotten to the point where I absolutely hate driving at night, especially in rural places or highways.
All of these are not my concern.
Being able to see is.
My concern is to mitigate this danger.
I have keratoconus. I'm legal to drive at night but I try to avoid it at all costs. LED lamsp create massive visual artifacts. They're much worse than conventional headlights. When they're brighter they create larger artifacts.
Unofficially it's to supernova those select few who don't know how blinding their lights are.