Spiders and waps are the only ones I don't kill. I'll let spiders live so they can kill all the wasps, mosquitoes, ants, etc. Spiders are our friends.
Meanwhile I just leave a window open so the wasp will leave my house, because wasps are fucking scary.
And because I grew up in a swampy area, I have no problem killing other bugs. There's like millions of the fuckers in my yard alone, and its silly to think a animal life == human life imo.