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Looks like you ran into a nest of bees talking about smoking out your tail lights, etc. I agree that you don't need to be screwing around with doing this because you are altering the effectiveness of your tail and head lights for safety reasons.
I think it might look kind of cool and in my opinion it's a ricer thing. But it is illegal so that's the only problen I'd see. Just do what you want, it's your car.