coupons you can use
"FREE TURN SIGNAL LESSON"
* Present this coupon to any cyclist, pedestrian trucker, fireman, traffic cop or 8 year old...
...and they will gladly explain why using a turn signal is a good idea even if there is nobody behind you
Even worse are people who put the signal on halfway through the turn. You are not offering me any new information at this point, I know you are turning.