Oh that's right, I forgot that the hairs are called trichomes on tomato plants (which are from the same family as cannabis plants). Not all trichomes have heads full of cannabinoids, unfortunately! Haha. But yeah I think I've seen crawling insects try and climb up a cannabis stalk before, and have trouble with the hairs, because they're pointing downwards. They don't look like much to us but I think they stop a lot of tiny invaders.