Regarding soccer, I couldn't agree more. I was in Sorrento during the USA-Italy match and the ratio of Italy to US fans was somewhere around 100:3 (and all the US fans were foreigners). It was certainly an interesting experience, but as passionate as the Italians are about soccer, I don't recall any times where either side's fans delivered an "in your face!"-style message (although some Italian fans did have airhorns). Sometimes, people who are extremely passionate about a particular team will be discourteous and rude to fans of another team (I hear about this happening, especially with regards to football, here in the States), but that was not the case.