Reading this, I am reminded of that Ace character from RW-Paris. I want to take him by the ear and throw him on a plane that will take him to whatever rock that one crawled under. Gross.
I lived in Rome for six months last year, and I was amazed by the number of Americans who were completely clueless. Most of the major tourist and shopping areas are bilingual, but I thought it was amazing how many people would compliment me on my excellent English, never stopping to think that I could actually be an American, too!
By far the "ugliest" ones are in the bars. The only drunken people I ever saw walking down the street talking loudly in that fresh from the frat house way were other Americans.