Off topic i scream louder then my wife when i run into a spider is that a bad thing?
Depends on how your wife feels.
And back on topic, I understand why you want them out, its one of the few good reasons I've heard for removing something, but im sure there is an alternative.
Maybe the fear will enhance the game? Like the small amount of terror I felt the
first time i went through an oblivion gate, which I never experience again and miss...
Maybe they can be an enemy you just avoid until you find an easy way to deal with them, Im sure you can make some uber spell just to deal with them...
In fact that sounds like a half decent idea for a mod, a lesser power that will kill any spider, but only spiders... Hmmm...
I for one want giant spiders, they will be fun to smash.