Heck, I don't know.
AmishDude is the only one that I know that is.
Maybe he can answer your other questions.
In order for these Schwartzentruber to maintain their position, they'd have to argue that the triangles are vain. There used to be what was known as "black bumper Mennonites". They'd drive cars, but paint the chrome bumpers black.
The orange triangle isn't vain either in purpose or execution. I think this sect just wants to start a fight. The Amish in Lancaster tend to follow all safety procedures on the road.