I can still remember my first internet argument. It was on Usenet, when I was 14 or 15, and it was over some finer point of Doctor Who lore, like how exactly the Chameleon Circuit was supposed to work. I posted an impassioned rant, and then watched in amazement as people started sending their responses. From Amsterdam, from Hong Kong... all over the world, people were telling me how wrong I was. I was totally hooked.