As in most major cities of the world with heavy tourist activity pickpocketing and minor theft is a common occurrence. But with various safety precautions it can be completely avoided to a large extent. When on the metro and other public transport always wear a money belt and keep valuables such as cameras, mobile phones, tablets etc in a backpack which is in the front of your body where you can see it and when in crowded areas keep your hands over the opening at all times. Avoid wearing expensive jewellery. Be especially vigilant in areas like Omonia, Monastiraki, Piraeus, Syntagma and the Acropolis - generally where many tourists / people congregate.