We don't have any dangerous spiders up here and I never kill them in the house, though my dog does get them if they venture into her snout space. Yellowjackets OTOH can be dangerous.
We have a patch of land between our house and a creek out back that is municipal land but I scythe the grass and weeds a few times a summer so we don't lose sight of the creek. Couple of years back there must have been a yellowjacket nest on the ground that I disturbed. I got stung once and backed off for a few minutes. Didn't see any more and thought it must have just been one of them. A couple of minutes later I was swarmed and they were stinging me as best they could. I got 60' away to the back yard as quick as I could and they followed me, still stinging. I had to kill them to get them to stop. Luckily I had on gloves and a hat which really helped.
I think I got stung nine or ten times. I got the phone and sat down for a half hour just in case I reacted and had to call 911. I was fine but I'm more careful now when I work back there and I know where there's one there are probably going to be more.
Actually they commonly nest *in* the ground, especially on hillsides, and near creeks or other bodies of water where there's a 'bank'; at the last place we lived, we were yanking out some really old ground-hugging juniper, and it had a considerable root system. In the course of pulling/digging those roots out, my husband encountered a nest, and they got him pretty good - he does a lot of yardwork, so he gets stung by those little buggers a lot, but this time, he was wearing loose-legged long shorts, uhh, commando... and take a wild guess where he got stung?
So now when he goes out to do yardwork of any kind, he puts on jeans and boots, with the jeans tucked into the boots!
Since I started doing gardening stuff about 15 yrs ago, I've gotten over my own phobia of stinging things -- my husband told me that my dancing around hollering was just entertainment for wasps, and that does seem to be true.
But, also at that last residence, there were a lot of black "mud dauber" wasps with nests in the carport ceiling. I was sitting out there one day (smoking of course, that was my smoking area!) reading a book, and one of those wasps flew straight down, went right over the top of my glasses and ran smack into my face -- right on my eyelid! Naturally it stung me, I think it was as surprised as I was. Should have seen me plastering my face and eye with wet baking soda! Which apparently worked; it didn't swell much at all.
But I mainly hate yellowjackets because unlike other stinging things, they WON'T just leave you alone if you leave them alone; they're the nosiest buggers on the planet, always have to come investigate what you're doing, and WILL NOT LEAVE!
Andria