To be completely honest black widows bother me the least of the spiders. They, at least all the ones I have come across, are less aggressive than brown recluse. Now I still tip all rocks, logs, or anything that has been sitting for more than a week away from me, but that is more for the snakes than spiders. I haven't ever found a spider in the coop though, I think the chickens get them before I ever see them.