I think it has something to do with exposure of culture. People around the world can see all the stupid things that Americans do because its all over the tabloids from the country, and entertainment news that is dominated by the USA. Although, perhaps it speaks to the overall "Intelligence" of a culture that will continue to buy that entertainment news and post an incomprehensible number of nut shots on youtube. Just an observation. I am Canadian by the way, so most of my tv is American stations.