I would invite the downvoters to try driving in southern France at their next opportunity. People pass on the right, drive slowly in the middle lane and tailgate dangerously in the left lane.

Then you also have the special letter of the law crazies who zig zag every minute across multiple lanes to pass people in the middle.

In some countries I know it generally works, in others it maybe doesn't. I can't speak for italy.

Yeah, having driven on Italian motorways - my experience is the exact-opposite of what the law supposedly encourages.