As in most European cities, especially in crowded areas of Istanbul, pickpockets have created all sorts of strategies to let you watch and without travel documents. Do not rely too much sense of "safety" seeing so many police. Istanbul is home of three
of the biggest clubs in European football and probably Turkey: Besiktas, Fenerbahçe and Galatasaray. It is advisable not to wear club colors: black, blue and yellow, red and yellow, especially on days of matches between the sides, due to rivalry and violence
that takes place between supporters.