Haha that's one way to solve a cicada problem, replace one nightmare with another! Though I'd argue hundreds of wasps might be slightly worse than the loudest cicada concert imaginable 😄 In all seriousness though, wasps are fascinating as long as they're not nesting anywhere near you. The moment they set up camp in your garden or roof, it goes from "useful predator" to full-on crisis very fast. A single nest can house thousands of individuals and they don't mess around when they feel threatened. Found this detailed guide on wasp and hornet nest behaviour that explains just how quickly things can escalate when a colony gets disturbed, your friend might want to reconsider the "cultivate hundreds of wasps" plan before next cicada season 😂 👉 https://jlm-traitements.fr/nids-de-guepes-et-frelons-dans-le-pas-de-calais-62-dangers-signes-dalerte-et-destruction-securisee/