This is not to say we don't have some share of a**hole riders but it sounds like that species is much more common out in your neck of the woods. Unfortunately, a Darwinian cull may be the only way for your bicycle herd to learn its manners.
I’m very familiar with the back roads in Ohio as I grew up in a small farming community in Ohio! Let’s just say the “back roads” in El Paso county are similar to what you’d find on a nicely paved state highway in Ohio with even more asphalt to the right of the white line. And for the most part, Midwestern manners are non existent amongst riders:)