Also, it's good idea to roll down the driver's window BEFORE the cop gets out of the car. They appreciate the ability to see your hands, and are less likely to think about the tint (since their view isn't ubstructed and can't see the now-rolled-down window anyway).
Oh I know. Whenever I have ever been pulled over I roll down all my windows haha. Only once was I pulled for my tint alone, rolled my windows down and he still wanted to rate them...it was 12.5%...FYI when tint dries it gets darker.