Oh it happens all the time in econ - although one could argue that economics at the moment does deserve some of it. You regularly get emails and even the occasional book, linking to yet another youtube misconception of how money, banking and the economy work. I usually reply pointing out the time at which the first provable mistake is made, and I've yet to get over 5 minutes. They do get extra points for being vaguely anti-semitic before that point.