Shadows are nice area for taking photos.
At first I decided to shout the shadows because I didn't dare to ask permission to these girls!
..so photographing people during their walk on the streets isn't allowed?! I do it almost every day...
I don't know... however, a public usage of a photo displaying someone without his/her permission is generally not allowed. Moreover, in that particular case, I was a complete stranger in a foreign country, ignoring what was allowed or forbidden, and polite or not. I just noticed that people there were very polite and always asked permission to take a photo of me.