Why all the fences and walls? Part of it is security. Security is very important to Italians. Most residences have a gate that includes a speaker phone and sometimes a camera. I'm told theft is one of the biggest crimes in Italy. It's hard to believe with all the fences, walls, security doors and alarm systems.
Here are some samples of the fences in our neighborhood:
Even in the parks, the playgrounds are often fenced in from the rest of the park.