From a distance, I take all sorts of images. There is no other way to see how zoos attrack strollers and produce kids, for instance. LOL. One shot of two beautiful Indian girls(India) was obtained by asking the father and other man(brother) with them. I wanted the father in the shot, too, but he wanted the kids in there. After leaving, I decided this was almost an imposition...they said yes...did they have second thoughts of what might be done of two beautiful little girls? I hope not since that image will remain locked up. This shot was likely safer than one unannounced of a little girl on a playground...cautious and overly cautious parents can easily overreact. Perhaps carry a few photos with you to show the kind of work you do..perhaps offer an email address, etc., where they can contact you if they want a print(gratis for the subject). We certainly have rights but lots of people are spooked easily nowadays. I would not use my "rights" to force a volitile issue but would certainly try to clarify those rights when approached by an unknowledgable arm of the law. Blatantly rude photographers(we have seen lots of them!) are rarely appreciated. Good manners goes a long, long way in bringing "a sense of goodwill" when in the field. This is just MHO. TomDart.