I'm a regular visitor to Rome and have had no problems with mugging etc...touch wood. Having said that I am careful wherever I go that I am not dripping in jewellery with a camera the size of a suitcase around my neck and a map in my hand! My sister has lived there for almost 12 years very happily. Of course, in touristy areas be careful of pickpockets. There are some pickpockets who are instantly recognisable - brightly dressed in flouncy skirts, tops, head scarves, babies in body carriers, and most of the girls hardly in their teens, If you see a group of these approaching you, hold onto your possessions with a VERY tight grasp as they try to confound you with their numbers. When i see them approach, i just move out of the way and let them pass me by.