Apparently, those nasty critters are actually quite territorial and if they see a nest is already in an area, they typically move on and create a home elsewhere. I purchased three small crocheted hornet nests off of Etsy and tried this for myself and the results have been amazing. I keep one in my hay loft, one in my horse trailer, and one under the overhang where the cross-ties are. Since doing so, I rarely ever notice a hornet or wasp while in these areas. Even when I do, they are much more manageable to deal with without running for my life. Definitely recommend!