While I somewhat understand the "officer safety" theory, IMO it's just an excuse, or PC, to pull someone over. I developed this opinion based on the fact that MANY friends of mine in LE have told me they don't really care about tint, they simply use it as PC, if at all. Every cop I know or have ever known has had limo all the way around their personal vehicles. They don't worry about it because with the flash of a badge, they aren't getting a ticket for it. And personally, I have no problem with a cop having dark tint. But I also don't have a problem with a civilian having dark tint as well.
If the "but a cop might get shot from behind the dark tint" argument is going to be used, the fact is, a person of the mindset to shoot a police officer will do so with or without the benefit of tinted windows.
But, what can ya do... It's "the law" and unless you find a way around it such as a tint script or the like, there's not much you can do except maybe hope you live in an area where the police concentrate on far worse offenses.