Well, our Australasian and American cousins obviously have more reason to fear spiders than we pampered Europeans. Has anyone seen the the pictures from Iraq of the Camel Spiders? They look suspiciously fake, like someone has pasted the head of an ant onto the body of a spider using photoshop.
Anyway, I'm petrified of spiders but if I find one in my house I won't kill it. Instead I pick the thing up in a piece of tissue and send it on it's merry way via the window.
I can't abide killing something over an irrational fear so out it goes.