The cop was just trying to fulfill his quota with a meaningless violation in Vermont.
Do tinted windows really create a vision problem? It is extremely doubtful as most states allow tinted windows except for totally dark ones.
Like Idaho’s problem with only one plate ... no one in government is using common sense.
Actually, according to what I could find, only the front driver/passenger windows cannot have tint in VT. The rear side windows and rear window are allowed to be tinted.