Is Rome unsafe and dangerous for travellers? First of all, let me tell you that like any other capital in Europe, Rome could be unsafe if you are careless and unaware. Small crimes such as pick pocketing has increased in the past few years, this is very true, and in my opinion, that is mostly due also to the recession and to a weakness in control by council.
However, what I recommend is to be aware, and keep your eyes open, especially in crowded places and during day time. They usually pickpocket from 9 am to 6 pm. After that they return to their camps.