It cuts down regulation and makes police checks easier as a light meter does not need to be carried to check the intensity of the tint!
I suggest that the law banning the tinting of the front windows of cars to more than 30 % is repealed. I understand that the inky black tint found on most limosines is not requied at the front but for the most part window tinting is used for security and crime prevention by stopping thieves see into the vehicle. It also prevents the build up of heat inside the vehicle on a short term basis so air con does not need to be used so aggressively to cool the car down. Also it is one less check that police officers need to carry special equipment for so cuts down red tape.