It's more complicated. For each obscure subject, there are one or two users that are experts or at least have enough knowledge. The problem is that there is a big amount of enthusiastic, that are exited about the new possible result and forget to see that it's almost sure a incorrect result. In some threads the enthusiastic user overhead the experts. A typical subject (without political interest) is faster than light travel. Or in other words: http://xkcd.com/955/