I'm biased on this one. Many sorts of spider bother me. If I was certain, and I mean certain, the spider was harmless(like a daddy long legs), I'd ignore it. I left a mother orb spider(very harmless) to make her 'nest' on my back porch, and had them moved(made husband do it) when it got ready to hatch(wasn't a wise place to keep the nest). But my husband's been bit by a few spiders we thought were harmless, and had major skin issues. So I may be a little 'squash quick' with spiders.
But really, it depends on the bug. I like ants. We don't kill ants, no matter where they are. It makes me happy to see them scurrying about. I don't mind a fly or two, as long as they're not reproducing. Beetles, earwigs, eh. Not bothersome.