So every time this guy is out driving he has to be behind people driving 5mph under the speed limit?
No thanks.
I know of a guy who would put one of those temporary sirens unmarked cruisers have on top of his car - he wouldn't turn it on, just slap it on top of the car.
As soon as the person he was tailgating in the left lane looked into their rearview and noticed the siren, they would merge right - allowing him to zoom past.