I have no problems in my Camaro (and I sit lower than your beater I'm sure) when passing newer vehicles. The only real issue I have are the older vehicles that people put in "better" lights but I cannot tell if those are the low or high beams. Especially whichever lights people put in that are a very light blue color. Those are just bright even to make you think it's high beams but it's actually low beams.
In my truck or the Camaro I have issues with certain sedans (mainly Mercedes ones) where its like they have high beams on but they don't. As I mentioned when I was in front of a newer Silverado (in my Silverado) and at certain angles (since the road curved left and right at times) the trucks low beams looked like high beams.
I will continue to flash people because when they leave their high beams on, I'll gladly leave my high beams on. Because after 2 adjustments, myself, people still flash me. Even when you flash someone with your low beams and those people think it's blinding, when the high beams come on, they are even more blinded by the light.
Yes, vehicles need extra rule(s) to make sure lights aren't blinding people and also have an manual (by each light) and electronical (in the cab) adjustment knob so you can adjust it either in your driveway or while driving down the road. Just like my 2013 Tundra had from the factory.