Mencius, just gotta say a couple things about that post...
one time i was staying in a tend in a friend's backyard in seattle (bad vibe town).
I live in Seattle, so I think I should chime in on this to clarify for others who don't live up here. This area of the country does have a lot of weird energies, however after living here for a little while you start to get pretty sensitive to various energetic pockets and their intensity/orientation. With that in mind, from my experience can be a very bad vibe town, and a very good vibe town, depending entirely on which specific part you happen to be in. And this has nothing to do with traditional 3D "bad part of town" criteria whatsoever; I know some bad vibe areas that look beautiful on the surface, and some good vibe areas deep in the dirty industrial sector. So to really get the best out of this place, it takes a bit of time and exploration.
As for the spider encounter itself...
next morning i caught the spider in a mason jar and tortured the poor, freaky thing to death by leaving it to suffocate in the jar in the sun. then we buried it.
... bad move, IMO. The spider made you aware of its presence (it didn't bite you, right? You found it before anything happened. That's not just your doing, but also the spider's). In all probability, it didn't want to be in your tent any more than you wanted it there. It may have just been getting your attention so you could help it get back outside.
But not only did you kill it, you did it with torture. 
Maybe people aren't used to hearing someone defending spiders, but they're one of my totem animals, something I only discovered many years after I'd already realized I had a subconscious affinity for them. And over time I've come to a pretty good understanding with them.
Within the nonvertebrate kingdom, spiders are incredibly creative and intelligent, and even in close encounters they generally don't mean any harm; they might even be asking for help. I've had spiders show up right near me all of a sudden, and sit there. Then I'd go get a piece of tissue, and "send" them visualizations of me taking them outside, to tell them that I mean them no harm but this isn't the place for them inside, and that they'd be more likely to find more food out in the yard anyway. On several occasions upon doing this, the spider would walk voluntarily onto the tissue, and hang on and not try to escape at all as I brought it safely outside.
Please don't torture living creatures.