I wouldn't be so quick to have a go at the yanks. some of the most embarassing ******s I've seen overseas are australian tourists.
they can be just as loud, just as offensive, just as boorish and obnoxious and just as ignorant as the stereotyped american tourist in shorts, hawaiin shirt and panama hat.
what is hysterical is that in my experience, a lot of those who complain about americans have never been outside of Oz anyway, or at least never gone to the end of their fuel tank in distance...
I've met far more decent americans than boorish hicks.
some of the commentary about americans is an extension of conrinuing urban myths. sure I found quite a few americans who were fat, and I couldn't stand eating their food, but geez louise, have some of you not been to westfields recently??
in my own experience, as soon as people found out where I was from they went out of their way to help, maybe naive on some things, but incredibly generous of spirit and genuinely friendly and helpful. (more so in the south and west)
there was a genuine absence of malice with all the americans I've worked with. Not a venal bone in their body. Those who have a superiority complex about "them and us" probably can't say the same.