Respect their culture or else... Ask permission first...If you get a yes fine but If a no and you insisted you'll be in trouble. I had a related experience..We were on a road show and and while waiting for the events we were taking shots. One Egyptian lady was holding the camera and we were having fun being photographed. Next scenario was she positioned to take a photo of one our colleague an Egyptian woman also. She said no and even waived her hand firmly but the photographer insisted and took a shot....you know what happened next? The subject accosted her tried to grab the camera but failed...not contented she got a bottle of water and pour it on her. I couldn't believe what I saw because those two were friends and working in the same organization.After the "shower" the photographer went to Ladies room and fixed herself then returned..after a while good thing happened they were already talking as If nothing happened.