Very true Corey but, as another patrol officer, I hate to see these kind of things, as it give all of us a bad rap.. As a non moving violation and being equipment related, (At least in Colorado) the cop's word is not enough and the final statement.. If the subject can bring in a letter(s) from verified businesses stating there is nothing wrong with the window, the judge would/will most likely throw the whole thing out. Using the excuse of "registration sticker does not appear to be white" is just piss poor probable cause for the stop and around here would only be considered a secondary charge as it would not hold up as a primary..
If the officers in his neck of the woods have time and energy to flag down that kind of a "offense", then heven help New Yorkers.. Don't even let a bug stike the window as you may be pulled over for obstructed vision..
(This opinon of course, is based on a one sided story and we all know there are at least two sides)