Ah, so you see, the problem with your complaint is that it occurred in the American pavilion, where free speech is one of our most treasured freedoms. Had you witnessed this in another pavilion, they might have been able to do something about it. I'll take a stab at how this could've been handled in various pavilions:
- American pavilion - nothing can be done due to free speech, and the fact this really is not odd behavior here
- Germany pavilion - probably would've been reprimanded very curtly, but still a free country (notice I used the word "curt"... not the word you're offended by.)
- Japan pavilion - everyone would've gathered around to take pictures of the crazy American
- China pavilian - not completely sure due to lack of transparency, but I think the offender would've been whisked away and locked away for a long time
- UK pavilion - security would've put their arm around the guy, and stumbled into a pub swearing at each other
All in good fun of course.