man i always wear a helmet, unless im putting my bike away, aka riding from the driveway to the backyard in 1st gear....
i never wear a helmet on my bicycle but on anything with a motor i wear one. we have lots of friends on quads, and they wear more gear than i do, but mainly cuz im poor and there rich;)
ive seen those people on quads(and bikes) without helmets, riding WFO on the road, yes they were hillbillys, yes i did too, before i knew better, and yes it was in west virginia. my cousin was riding a "sport" quad, or at least the ones that dont have racks and reverse and 4wheel drive.... on the road, WFO, on bald, BALD tires, his left front tire with about negative 5psi, and his girlfriend on the back. once he realized his tire was flat tho, he let her off and she got on the hayride with the rest of us. (my other cousin was driving the tractor, with a cooler full of beer by his side, and if i remember right 4 more in the back) boy was that fun!!:p