There is a lot of fraud in olive oil business in Italy. If you read the label on a bottle of Italian olive oil, you'll see that it often contains oil from other countries including Turkey, Algiers and so on.
Since I don't have the time to worry about this, I just stay away from Italian oil. There are plenty of alternatives.
http://www.truthinoliveoil.com/2012/09/toms-supermarket-picks-quality-oils-good-prices