A few days ago I was driving down the street behind a car which, as was warned by prominent display of rooftop sign, was being operated by a Student Driver... a sign which really wasn't necessary, given the stammering mid-intersection braking and sideview-mirror clipping taking place all the way down the road, and I had this great idea that it'd be a real public service - a true exercise of civic duty - if other drivers could collectively contribute to driving lessons, by driving like raving lunatics around students, just to get them on their toes and on the lookout.