It doesn't really matter to me -- I'm in southern california, and I drove a pathfinder for 10 years with near-limo-tint and never got pulled over for it. When I *did* get pulled over for (usually speeding) there was no mention of the tint made. I am driving a black SRT-8 with very dark tint - if I get pulled over, I may end up getting a "fix it" ticket to have the tint on the driver-side and passenger-side windows removed - so what - I'll have them stripped, get the ticket taken care of, and the next day it goes back on. I'd consider it an operating expense. Statistically speaking, I don't plan on getting any tickets for the dark tint, and if I do, it will probably only be 1 or 2 for the time I own the car.
I even have a light tint on the windshield (yeah supposedly you can get impounded for having windshield tint, but again, I could care less since its a light tint and they'll probably never notice). It's actually great - it cuts down on the sunny glare and people can't see inside the car when they're more than 3 feet away.
I'd consider the process of getting a ticket for tint, then having the tint (temporarily) removed then re-applying the tint to be a victimless crime, for the reason that the sweeping rule of "no tint" exists is obviously the police not wanting monkey business going on (or more importantly, a gun being pulled) that they can't see when they've pulled someone over.
Since I'm law-abiding (except speed limits on empty freeways), all I do if I get pulled over (which I have once for speeding in my SRT-8 ) is put both passenger/driver windows down AS I'm being pulled over, so that the cop can see me and feel more at ease. Whether or not he wonders if I'm trying to "hide" my dark tint on the rolled down windows is his problem - at least I've put him a little more at ease which is all I care about.