Street thieves are the main scourge of the Eternal City. Therefore, the first and most important rule is to be vigilant on the streets as there are plenty of pickpockets around. It's better to hang your cameras and camcorders around your neck to prevent thieves on mopeds from snatching them off your shoulder.
If you have rented a car, never leave valuable items inside it - they can even be taken from a locked trunk. The Termini train station is considered the main place for the activities of the Roma people (gypsies), so it is not recommended for visitors to stroll around here unless absolutely necessary.