I went to the zoo with a friend of mine yesterday. Now friend has multiple 6 month old babies. By multiple, I mean more than 3 (she made the news. I don't want to be too specific). Obviously, her stroller is huge, and she gets lots of stares. A woman walked up to my friend, and asked if she could take a picture. Friend said no. Apparently the lady was not expecting that, because she moved around and started bringing up her phone like she was going to take the picture. Friend said "No thank you" a little more firmly, and the lady looked really surprised that my friend was not jumping at the chance to be in some random person's pictures.
OTOH, I apparently have RBF (resting ***** face) and don't look approachable. Friend went into the bathroom, and I started changing baby diapers. A lady came over with her child, and counted the babies. Looked at me like she was going to ask something, did a double take at me (note I also had my own LO on my back), said "Oh, wow" and turned and went inside. I was generally amused.