@albertcardona Entirely harmless, really? *Pepsis* is similar, and I thought its famously agonizing sting was a necessary adaptation to being a large-spider parasitoid.
@albertcardona Oh, so you just mean as harmless as *Pepsis*?
It's true that I've spent a lot of time around wasps that didn't sting me. But I also wouldn't describe the wasp stings I *have* received as "harmless" 😃
@radehi A wasp that (mis)uses venom on a human is wasting precious resources, and likely only did that in response to a perceived existential threat, real or not. We aren't their prey. Also, and unlike, say, a venomous snake bite, a wasp sting can't kill except via anaphylaxis.