This might be a terrorist.
This might be an author.
This might be an autistic person.
In one scenario, there is a future where people will cry "we could have prevented this tragedy". In another, that is one reason why autistic folks are being side-eyed, and that makes me sad.
Black windows are pretty common. You could also try some of the larger centipede and scorpion varieties, though they may not always be lethal to everyone, they can still be considered very dangerous.
They also are not aggressive. If you don't fuck with them, they won't bite you. There are much more venomous spiders. Like the Sydney funnel-web spider, the most venomous spider in the world. And of course it's in Australia.