The pest control is their rent. Would you let them cruise around otherwise?
I got a cool pic of one of my tiny jumping spiders dragging an insect to it's death behind a wall ornament, but I don't want to freak anyone out.
EDIT: Found the pic! Warning: It's very close and very clear and very freaky.
I'm not gay, and certainly not into bears, but this guy makes me feel I might not have a choice in what comes next.