Thats never the problem. Most bikes have a horizon point just below the average car’s side view mirrors. A little bump in the road or even acceleration will momentarily raise this point higher in to your view. Where it looks like the bike is being a dick or flashing you, the reality is they are just cruising along, driving on the shitty NY roads.
Believe me. This IS the case. There’s been a few dick head cars that turn their high beams right in my face when going opposite directions, THEN I show them what my high beams look like. It sucks, but it’s the roads.