Certified arachnophile here. Killing a spider in my house is grounds for getting kicked out! If there is stuff in my house for them to eat, I would rather that they caught and ate it (damn, I wish there were spiders in my house big enough to eat the roaches that get in!) than that the stuff kept flying/scampering around! And yeah, I've had as many as 15 tarantulas at one time. It's depressing to me that I have none at all right now
I'm not so much scared of spiders, as much as I am compelled to kill them! I don't like how they bite me in my sleep or walk on me without me immediatley noticing. I pretty much hate all bugs... but they have their purpose.