I just read this very sad but true post by by Kate Sedgwick over at Traveler's Notebook titled: How To Avoid Being an Ugly American Tourist. (Thanks for the link Lola!)
"Tourist telltale sign #452: being a totally disconnected spectator." Photo: Jon FeinsteinFair enough, there are obnoxious tourists from everywhere on earth, but the article states some darn good examples of ugly tourist behavior that are commonly associated with American travelers.
I especially like Lesson #3: "Be humble. Your country sucks, too."