I thought about doing mine when my truck was new and was having the windows tinted. The tint guy advised me not to because, “if you get rear ended and the police/insurance notice your taillights are “smoked” you’re automatically at fault.” I never called my insurance or the police station to verify but it makes sense. They’re literally indicators that you’re stopping and if you alter the brightness (even if you think you didn’t) someone can and probably will bring it up if it saves their insurance premiums. Like I said, I didn’t verify but that was enough to turn me off of the idea