Mark, ever drive a Rhino with a windshield in place? Good friend of mine put one on his along with a type of bimini top to avoid dust and debri only to discover at cruise speed it caused a vacuum to form right behind the windshield that sucked everything in on the driver. He's now back to wearing goggles and using only the top.
As far as the helmet issue goes, I couldn't care less who wears one and who doesn't since it's none of my or anyone else's business what the other does.
Alaskaman, are you overweight, underweight, do you drive over the posted limits, skydive, smoke, drink, have high sugar count, high blood pressure, stare at tv or the computer too long, live under power-lines or in any other way live your life in a manner that costs the rest of us for your own actions? If so should you be "required" as you put it, to make changes also or would that be an imposition on your rights?