The night is dark and full of terrors and spiders are clearly one of them. Especially the big and icy ones from A Song of Ice and Fire. And what about the giant ones from the Hyrule and Middle Earth Universes? The sane man fears them it seems because he can't help but fearing them. If there was an anti-spider gun in the future I think that people would buy it, if it killed the big ones. Now if there was a drug that helped to make you less afraid of the miniature spiders...well that would be a different story then.