People who wear face lights /can/ be annoying. I also think it's vain. I also think it's unfair to people and area designers who depend on lights to create the environment's mood.
However, to take this away is to disregard the freedom of expression.
What I propose is simple: A toggle option to set the client to not render lights that are attached to avatars.
As I understand the other, all it does right now is to make attached lights black in color, but they still count toward the maximum light sources rendered... I'd like that fixed so they not only don't show, but don't count toward that maximum total either.