Actually the worst thing that could happen is it's a venomous spider and it bites you or someone in your house and they either get sick or die.
Even worst luck would be before it does that it infests everywhere else in your house making it more likely to hurt someone or something.
Honestly you're raging because a small venomous creature that infests houses and kills/hurts people if being killed ?
You must be with crazier division of PETA.
< Related brown recluse bite.
actually never mind cause that shit is too sick instead here's a happy dog.