The most common menace, especially in large cities (particularly Rome), is the plague of pickpockets and roving gangs of gipsy children who virtually surround you, distract you, and in the confusion try to steal your purse or wallet. Never leave valuables in a car, and never travel with your car unlocked. In these uncertain times, it is always prudent to check the U.S. State Department's travel advisories at http://travel.state.gov/travel/warnings.html.(Source: frommers.com)
Remember also that no Policeman or Carabiniere or Financial Guard or Council Policeman has the right to asking you to show him your money. This is an uncommon hoax made by robbers with fake italian police shields. Please be carefull if you find yourself in this trouble.
Anyway, Rome is a Safe City like any other Capitol of Europe, so don't be afraid of it but enjoy your Roman Holiday.
We have reported here a general information about staying safe when in Rome.
EMERGENCY NUMBERS
Police 113
Carabinieri 112
Fire Brigade 115
Road Assistance 116
Ambulance 118
City of Rome Council 060606
We can also add some tips by the B&B Savoia.
Leave your passport in the inroom safe. Just bring with you a copy of it.
Never keep money, cards, jewels in your bag. Better a pocket, preferably hidden under your clothes
When on the bus (and tube / metropolitan / underground) keep you bag ( Backpack ) in front of you, preferibly close to your abdomen
Don't wear expensive watch or jewels
