Hmm... Here, if stuff is flying out of your truck, you get nailed with littering (except stuff from live animals and clear water... lol, don't pee alongside the road! The same law that prohibits the dumping of used motor oil covers "unreated human waste"

), so if a rock flies off a truck and breaks somebody's windshield, the receiving somebody usually reports an 'untarped' load. But, if it came from the roadbed, then nobody is at fault.
If you have more than one seizure in the space of 5 years (correct me if I'm wrong), they'll suspend your DL. Having seizures is a disability, right? And, if you can't meet the safety standards (aka blindness) you're denied a license. Driving is definitely a privilege. If a disabled person can't remove the snow from his/her vehicle, there's always Public Transportation.
A few years back, I had a neighbor that was disabled, and she wasn't able to drive, so I picked up whatever she needed while I was out and about.
Hmm... there ought to be a provision that allows disabled persons to drive their vehicle to a carwash or something to have the snow removed.
I'm not trying to anger anyone, just discussing a new law. Thanks for bringing up the ADA side of things PapaG.