I was a bit self conscious with baby#1 but still NIP. I usually tried to find a quiet spot away from main traffic and be covered.
Now with #2, if we're out it's so hectic with a toddler and keeping baby content that I don't even think of it anymore. I still am covered but I don't spend time wondering what other people are thinking since I'm just trying to keep two little people satisfied and can't go find a quiet corner since LO1 wants to stay and play with her friends.