I haven't run into (no pun intended, but I'll take it) the hazard-flasher idiots.
But pretty much every time it rains, cars emerge from the downpour & spray without their lights on.
Usually grey or black vehicles, including pickups, and once or twice big-rigs.
I've actually had a close call or two when pulling out onto the highway into town.

I think it was NJ or PA that had a law: wipers on = headlights on.

Regardless of conditions, the guys driving log trucks around here are like the tanker in "Duel"...