Why does everyone talk so bad about sunglasses?

I am a new poster but I have been reading these forums for about a month now. I play in the NL games in Tunica, mostly at the Gold Strike. And for those of you who dont know it, that game is a 1/2 game, but there is usually between 5-10K on the table at any given time. I wear sunglasses at the table for my reasons. There are several other regulars that do the same thing. Why do some people berate the people that wear sunglasses at the table in a game like this. I would understand if it was some 2/4 limit game or something like that, but the at the NL game the pots can get up to as much as 2-3K.

So why do people berate others that wear sunglasses at a table?