Naples ~~~~ Is it really that dangerous?

Is Naples really that bad? I am planning an 11 day trip to the Rome area and
was contemplating using a free 7 night stay at the Renaissance Hotel in
Napoli using Marriott rewards points.

From there I would radiate on different day trips before returning to Roma
for the last four days.

I started doing my homework this morning and all I read about Naples is
pickpockets, trash, drugs, mafia and murders. Many posts and web pages warn
not to wear any jewelry and to leave your valuable cameras at home and
beware of vespas zooping by?

I have been to Northern Italy a couple of times as well as several major
European cities and have heard the same warnings elsewhere, but not a as
many as NAples. What is the real scoop?