Most backyard gardeners are fearless but, we all have one thing in common. We don't like venomous bugs particularly spiders. If you've ever been stung by a bee or bit by a spider.. . you never forget it and you always have a bit of fear in the back of your mind. That's a good thing.
Fear means that you practice caution before you stick your hand in the dark spot under a board or before you decide to stick your head where it doesn't belong. Spiders live everywhere. Some like dark places, some spiders like wet cool places, some live out in the open and some live up above and like to pounce.
If you've ever seen the movie Arachnophobia, you'll understand the fear of spiders (arachnophobia). We all don't have John Goodman around to debug our gardens and so, you must educate yourself on what spiders can really hurt you or what spiders are just as much afraid of you as you are of them.
We all know of the Black Widow spider but, did you know of a spider that's called Brown Recluse? They're considered hunters. They go out looking for their pray instead of waiting for their victim to land in a spiderweb. Their bite can range from being irritating as like a mosquito bit to damaging skin tissue as to where the skin is actually rotting away.
Get to know your local spiders. If you know what you're dealing with, your less apt to get bit and you'll know how to deal with the bite if you do get bit.
While surfing the web in search of bad spiders vs good spiders, I came across a lot of good information. I didn't know that Orkin the pest control exterminator has a great dictionary on their website of common pests particularly spiders.
Orkin even writes about a spider's diet, habbits and behavior. http://www.orkin.com/other/spiders/