I...don't understand arachnophobia. Can someone care to explain why spiders are the bane of many people's existence?
A phobia is a fear of something irrational. Like Arachnophobia, Aquaphobia (fear of water,) Coulrophobia (Fear of Clowns.) Things we shouldn't fear but people do. We don't have phobia's for people wielding a weapon because that is a rational fear.
I'm sure I've read somewhere that Arachnophobia is the most common phobia. But to answer your question, there isn't an answer as to why people are scared of spiders. A certain amount of people just fear them, as I mentioned. A phobia is something that is irrational. As a pretty bad Arachnophobia myself, I know that spiders are hardly a threat to humans. I've held snakes plenty of times which I know possess far more dangers but I still always threated spiders as http://3.bp.blogspot.com/_LbccUVbSRd8/S8N_erx3cnI/AAAAAAAAGiQ/Z7oXqcT2PW4/s400/spider+2+haah.JPG
My aunt recently bought a Chilean Rose tarantula and a Cobalt Blue tarantula; I've spent time around them both and I have to say, I'm less afraid of spiders than what I was, of course my house has been spider-free so far since moving in but If I can stay in a room with two tarantulas. To the OP; If you're really that scared either wait for a mod so that they've been replaced, or, something that actually works for me when up against spiders. Play in third-person, I don't know why but I'm easier playing in third-person if I have to face a spider. Maybe that is why I stormed through Dragon Age.
(o/t; A screenshot of DA-II has a spider that is twice the size of those in the first game and Skyrim!)
Edit:
what is a phobia of venom called anyway?
There isn't, as vemon is often deadly it's rational to be afraid of it.