Shorts, thongs.... Clothes represent personality and social status in Italy so people wear nice clothing almost all the time.
Italians seeing you for the ﬁrst time will judge you by your appearance, and will respond accordingly. So if you dress or look like a tourist, you will be treated like one. For this reason when you go to Italy try to blend in, wear nice clothes and have fun!!
In this way you will also avoid attracting the wrong people!!