Arachnophobia? Well I'm not one of those. I never killed not even a spider, any bug even if it's dangerous. I know how to deal with them, and just get them out of my house without causing any harm to them. My mother and grandmother do the same every time they see any spider in the house. Spiders are also living creatures, they do have a right to live too.
I don't understand those who always kill a spider even a tiny one every time they see it. The life period of spiders doesn't reach any number higher than a year, the only exception goes to tarantulas and other kinds of giant spiders who can live maximum 30 years. But I still don't find that a big reason to decide that they must die whenever we want.
The reason of such fear of spiders imo lies far in the past of a child who: saw many scary movies about spiders being merciless killers, or saw his parents/sisters/brothers or friends being afraid so much of spiders and advising him to stay away from them too, or he himself got bitten by a spider which probably resulted in him staying in a hospital for a long period of time or just hurt him a bit. All this affects the child's psychology and changes his opinion about spiders for the entire life.
There is something I want to say though, a spider will never bite for no reason. It bites only to defend itself from what they might understand as an attack from a human, especially lil kids who have enough curiosity to catch a spider and see what will happen to it if they will cut his legs...etc. Hence, we are the merciless creatures, not spiders.
Sadly not everyone understands this.
If a spider is poisonous, trying to kill it is also stupid imo because it can still manage to bite you after all and because you're actually killing it instead of calling a group of specialists whose job is to get dangerous animals out of your house. ( If such groups exist in your country ofc) .