In my experience in the States, I didn't have to watch a documentary to run into the freaks -- they always seem to be well represented in every store, checkout line, party of a friend, workplace. It's a lot easier to run into strange people with whom ten minutes of conversation reveals that they don't seem "quite right," in the US, than in the UK. Yes there are normal people there, but even some of them seemed off. Those documentary makers really don't have to look all that hard...