Heh heh, I looked them up as well a couple of weeks ago. They do not seem to be much of a threat to people, but they sure look like they would hurt.
There are a bunch of them around here and I leave them alone. Just like the long dangly legged ones that eat spiders, and the mahogany ones. i have never had a problem with them. Now the yellow jackets and bald(black) faced wasps, that is a different story.
But like everything else, those were northern problems. Seems even the wasps are more mellow down here. Probably not such a rush to get things done before winter, that makes people nasty too.