Sunglasses

Why is it that when I wear sunglasses I feel invisible? It's like I think people can't recognize me or won't know who I am, even though I know exactly who they are. I have to admit I have a bad habit of feeling like I can stare people down when wearing my shades.

However, what's really sad is when I'm wearing my regular ol' glasses rather than contacts and forget people can see my eyes as I stare them down!

Anyone else have the problem of the incredible invisible sunglasses?