no to tail light tinting. why would you want to make something to help other drivers not rear end you harder to see? and do not say that by tinting them it won't reduce disability, how can adding black ANY percentage NOT reduce visibility.
Also looks ricerish.
'09 LCI 335i E90 in Oyster over BSM, 6 spd, Sport, Navigation, Individual Audiophile, Executive, Active Steering, JB4, BMS DCI, Euro Tails/Fog Light Switch, various painted and other OEM + mods, 19" M5 reps summer, 18" M6 GC reps winter.