If it’s a pest (anything that is bad for the house or a health hazard such as houseflies or mosquitoes) I will smite it.
Spiders I let outside unless they’re tiny and then I smite them, which might come down to laziness and the fact that I don’t want it growing up into something that will eat me in my sleep. I would rather go to sleep with an angry pregnant hippopotamus in my room than a large wolf spider. I distinctly remember one time as a teenager there was a huge spider crawling casually across my carpet. I found nothing close to me convenient for smiting, so I went to the bathroom to grab a pair of slippers. When I came back it was GONE. I don’t mind spiders as much as an adult, but I ended up sleeping on the couch that night in case it decided to crawl into my mouth for a drink.
One time I woke up and my tongue was brown and I had an odd taste in my mouth. All I can say is that I’m glad I was unconscious when I smote it.
If I’m in Australia and the insect has health bars and is in the early stages of developing stone weapons, wheelbarrows, and advanced language skills, I might end up smiting it instead of arm wrestling it to get it to go outside.
Some insects, such as crickets, I almost think of as pets for whatever reason. I would never smite a cricket.
(In before an armchair etymologist reminds everybody that spiders aren’t insects)