It feels so wrong for me to photograph kids that I do not know the parents. I would (think I did) get upset when some stranger took my kids photo and then took off. I know as a photographer its all about the moment and taking the time to ask permission, you lose the shot. Still, it is creepy. IMHO.
@tyansia I totally agree with your point of view and feel as uncomfortable as you do taking the photo. But I was sitting beside the mom of this little girl and she was ok with it. She is beautiful isn't she.
