If those "defending" the use of tail light tint feel there's no harm in it - why put so much effort debating on the forum. Go down to your local police department, ask the officer to inspect your car and if it's legal. If it's legal then have them document it in writing and post a picture of said proof.
Otherwise you're interpreting laws towards your bias of a modification you "like". I'm sure on your can of VHT nightshades or whatever the "in" thing is to use for tinting them - there's somewhere on the can that says "for offroad use only".
I have $20 I'll pay to the first person who can show valid proof from law enforcement that your tinted tails are legal.