I read somewhere that you can have the fronts done but there is a legal limit. I think something like 70% of light has to get through so the rozzers have to test with a light meter before they can impound your car. You do get a 30% tint which I believe is the lowest but since the window already has a slight tint from the factory if you ahve it done it takes it to over the 30% legal allowance. I have been unable to find a place that has 20 or 25% tint. So I can't do it. If I am not mistaken either, the rozzers have to issue you with a warning to remove the tint and set a date when you have to produce the vehicle for inspection. Your mate was mad for letting them just impound his car, unless they had pulled him up for it previously perhaps.