Thank you for sharing the story about your encounter with those site workers. The truth is that the boss was just trying to exercise his power unjustly. He couldn't have even shouted at that man that gave you the permission but to talk to him later when you might have gone out. In any case, always ask for the highest person in position wherever you want to take pictures of that nature. Otherwise, you can just take the pictures codedly without anyone knowing you are taking pictures. Most people won't even allow to take pictures of you ask for their permission. But just use discretion next time. Sorry really saved the situation