Immediately stomp an insect when they see one inside the house. It's like a reflex or impulse and honestly it's kinda scary seeing an otherwise nice person just stomp an insect or spider or whatever in cold blood almost instantaneously. There's like no thought or contemplation, it's just see the insect, and then immediately stomp it.
Like holy shit what did that little critter do to you? Just let it be.
EDIT: Holy fuck the responses. I guess many didn't actually read what I wrote. I wrote that people who "immediately stomp" without "thought or contemplation" have fash tendencies and I get accused of fashjacketing. Ugh whatever. To those who had thoughtful responses (e.g. if you feel something stinging your skin and swat it with your hand, or if you have an infestation issue in your house, etc.), I gotta say those make sense and I hear you all the way (and even in those cases it's not like there's a kneejerk intentional kill response, it's usually accidental or done after careful deliberation). But to the ones complaining about fashjacketing, maybe do some self crit for fuck's sake. You sound exactly like the fucking man vs bear defender types or a white fragility type, Jesus... It makes me actually think you do have fash tendencies tbh.
Bugs that are causing harm are a different story. You wouldn't kill a fox just for coming across one in the woods but totally would if it was determined to attack you. That's a perfectly reasonable approach, if a raccoon couldn't be shooed away by threats of violence or even the lightest of violence was totally lethal, we'd have a lot more dead raccoons. But yknow bugs are just smaller and easier to kill animals and killing them just cause it's easy is a pretty disgusting common thing to do. I wouldn't say it makes you a fascist but it does mean you're willing to kill something you deem as inferior for no reason and refuse to see that it's a living being with its own stuff going on and whatnot, there is a thread of fascist thought there.