Sunglasses in Live Poker?

Now, anyone who has watched televised poker has seen that a lot of players wear sunglasses to hide their eyes while they play.

What do you think about that strategy? Personally I think it makes them kind of look like dorks but if they're winning money then great! Does anyone here do this for live games or have considered it?

I like the players who don't put them on and can bluff without any advantages the best.