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Very interesting about the effects of bombing a house. I haven't bombed in years now. Since removing the carpets we simply haven't had any infestations. (That I have been aware of. ) I haven't been willing to risk the small finches that live in the house either. In the past, I have been known to use the chemical No-Pest strips. I found them to be helpful with controlling the both house and fruit flies. But then I got to thinking that even if it's clear across the room from the little birds, and the fish tanks, That I just don't want to risk anything. I would rather live with the spiders. With the flies on the other hand I have simply gotten very good at swatting them. I have also found that fruit flies are easier to nail if my hands are wet. I don't mind crawlies very much, but things that fly into my face are dead meat around here. It all depends on how annoyed something makes me. I am going to have to look up about the Hobo spiders though. I have been known to relocate a beastie, if it's not ignoring me properly.
I am fairly certain that the only reason that you even saw your spider was because of the dark. Most of the European House spiders prefer dark hidey holes. They are foragers, so they hunt and have been known to bite. The House Spiders are not considered venomous, but I will assume that the bite could still hurt a bit.
Many years ago I had a girlfriend that was bitten by a spider, and she had a very large patch of skin that turned very black.
While I like spiders, I do have some major limits as to where I will let them live.
I wanted a very hairy tarantula, then I read somewhere that they can live up to 30 years. I don't want any pet that will live that long at my age. So my all time favorite spider are Black and Yellow Argiope spiders. They are very polite field spiders, and don't want to live inside with me.
I looked a few pictures of the Hobo, and I know for sure that I have swept up dead carcasses of that kind of spiders. Now I don't think that I will ever be able to think of using bug bomb a place that I am plan to live in. One web site says that you need to bait for hobo spiders.