Most cars idle at 5 to 6 mph, so any roll through a stop sign is likely to break the 5 mph mark.

> Any cop watching an intersection would ticket this.

Not sure where you live, but this is absolutely not the case where I am. I have only ever once heard of a traffic officer ticketing for this. On the other hand, I see cops watch on as people ignore "no turn on red" signs and let them get away with it pretty much every day. Let alone rolling through an intersection at 5 mph.