Well I guess they're not really spiders, they're a gang of daddy long legs. I live in the basement of an apartment complex in Chicago and they keep the spring hoppers and basement bugs away. They make their webs in places I'll never reach or be in (although one lives on the wall parallel to my bed, but he guards a mouse trap from bugs). I try not to kill them unless they're near my bed because otherwise they don't bother me and they keep the gross garden spiders away. They're really interesting to watch. They hunt differently from other spiders and not a lot of research has been done on how daddies actually hunt. They weave their webs but tend to hunt outside of them. While other spiders will wait for a vibration on their web, daddies go after any bugs near them as if they can see them. Then they'll mummy the bug and crawl around with it all day. They also have a defense mechanism for predators which is basically spinning so fast they look like blurry blobs (yes I've tested this, lel).
When it comes to other spiders, I kill them. These are the sorts that'll crawl around your bed for warmth and darkness. Daddies have evolved to survive by doing as much as they can to prevent anything else from knowing they exist.
