Noone should get on your case for wearing shades in any game where there is that much money on the table.
I wear them whenever I'm playing 15-30 or higher, and sometimes at 8-16 too depending on the game. This idea that they kill the social aspect of the game is bunk. I played 15-30 last night where half the table including me was wearing sunglasses (I was wearing
these, they're great because they're not dark at all) and the table was chatty, lively, and friendly.
Frankly I think people whine about sunglasses because they don't like playing against people when they can't see what the other player is looking at.