rationalskepticism.org

I don't kill any insect that doesn't put itself in harms way. If it enters my house and stings, bites, or poops, it is fair game. I always prefer safe live removal first. The exceptions are itchy biting insects, ants, (mice), and houseflies. Their trespass was not an accident. I have hazards set up in preparation for their attempted invasions.
Outdoors, I generally don't kill any insect unless it's biting me or trying to.
Of course, when walking across a lawn I'm almost sure to squash somebody by accident. What can you do?