Automotive nose-picking

I have, since the beginning of September, made five trips between Pennsylvania and Colorado. One of the things I've noticed is that people seem to believe that there is some sort of invisibility cloak over their cars such that they can go mining in their sinuses with impunity. The worst I've seen was on the NJ Turnpike last year when some bloke was so deep in there that it appeared as though he was chafing the underside of his proboscis with his wristwatch.

Throughout my recent five trips, though, I've seen a variety of nasal mining techniques among an equally wide range of miners. Schoolmarms, construction workers, hotties, and creeps alike were busy searching for the Lindberg baby or Jimmy Hoffa in their sinus cavities. I'm wondering if the automotive industry does something special with the carpets to protect them from the deposits (although I did see a number of people who decided that what they found lingering among the nose hairs was something worth snacking upon).