the piggies generally try not to be as vulgar as they are in America; they hide this vulgar side from the Europeans (for the sake of their own piggies' image).
Puzz, I don't know what you've experienced, but can you elaborate on the :"vulgar" part? I don't see this nor am I blind to it. I interact with Americans and PL every day and the worse I ever hear is a PL "stupid" joke. These aren't acceptable, but far from vulgar. I actually hear more black jokes than anything else.
Can you provide some examples of this vulgarity? I'm interested to hear what you've personally been through to make that statemant.