This is something I've been thinking a lot about recently but I'm still not sure what is right. My rule of thumb has been that I'll kill any bug that is infesting my house or causing a problem to my health. Like I would kill termites or bed bugs if I had those, or like a leech or a tick. But recently I've been getting a lot of flies in my apartment and while they are technically "infesting" the place, they're not doing anything to harm me, just annoy me. Is it wrong to kill them?
Also I would like to say that if I encountered any of these bugs out in nature I would leave them alone and not harm them, this is only in the context of a threat to your sanitation or home
Mosquitoes and flies get the smack, same with venomous spiders. If I find a black widow inside or on the porch it's smashin' time.
I'm more scared for my nieces and nephews than for me. It would hurt like hell but not kill me. But the 4 year old? Shit could be fatal as it would take a long time for an ambulance to show up at my rural abode.
Spiders I usually trap and throw outside, unless they are content to sit in a corner web chilling all day. They don't bother me so I don't bother them.