I've done it cause apparently everyone else thinks it's "no big deal" like you say and it's fucking terrifying. I wasnt stoned off my ass or anything, but it definitely made me hyper aware cause I wasn't enjoying myself and felt like I was putting everyone else in danger if my attention lapsed for a moment.

Sucked ass, never again, idk why anyone does it, but they're probably just car-brained and not afraid of the road.