I have several big specimens of those spiders in the picture in my house right now. They're called huntsman spiders and are actually harmless.
I wouldn't like to see vacuum cleaner guy doing his thing, as it would make me angry.. these critters are very shy and most useful, as they will eat their weight in mosquitoes every day.
I used to keep them in my room on purpose, as a child.
They are soft and fuzzy when you pet them, like velvet. And you can hold them on your hand without being bitten. Even if they do get a scare and bite, it's less painful than a bull ant, and no venom at all.
The biggest one I ever saw in the house - well, I tried to catch it with a large salad bowl.. and the bowl wasn't quite big enough! Probably twice the size of an adult hand, in legs. Golf ball sized body. She was really something! Too big for even me to want inside, so I let her go in a tree in the yard.
Dan, what you're talking about with the most venomous spider is a Sydney funnelweb. None of those around where I live, thank goodness.
I was bitten by a white tail (UGH), which is not so poisonous (ew, butt ugly though) but the nasty bacteria in its mouth caused an extremely bad systemic infection which in turn blew up a dormant congenital issue...so yeah, that was pretty horrible.
But there's worse things in the world. Like killer people. Give me a spider any day!