So basically the problem is reduced to "how can Italy fight against a crime happening somewhere in Russia or Ukraine"? Imagine there is a TV broadcast from Russia, how can Italy forbid it? They can definitely disrupt it (by electronic jamming), but not forbit it. Similar to Internet, the difference is the medium of transmission, not the facts of the matter.

In Communist times in my country I was watching cartoons broadcasted from the neighboring country. Adults were watching adult content at night from the same source. There was no way to stop that.