Actually - in many cases, putting a spider you find in your house outside IS killing it. Spiders that we identify as "house spiders" require a lot of shelter and are ill suited to being outside. They might find shelter in a shed or under a piece of furniture but out in the grass? Certain death.
Generally when I find a spider in my house - provided it's not a white tail or something worse - I just leave it alone. Huntsman spiders are aggressive predators that take out the other spiders in the house. Good job guys! Keep up the good work! I usually have 3-4 large huntsman spiders wandering around in my kitchen. They're highly beneficial and I see moving them away as completely illogical.
We shall have to agree to disagree on huntsmans lol. I wouldn't be able to use my kitchen if I had them in there! They are one spider that just creeps me out. Yet I'm live and let live with all the others.