I was always told that mud dobbers(?) don't sting. I see their nests all the time and just grab them or knock them off and throw them on the ground. I have never been stung but don't want to push it if someone knows different.
They sting, just usually not you. I have seen on my front porch, 8 little legs, like a spider ran his legs off. Apparently, a D. Dobber will bite the legs off of big spiders, so they will fit in the nest.
As a kid, I knew if the spider webs were prominent, and everywhere, it was time go go back to school in the fall. As it turns out, that was the DDobbers. They quit getting the spiders just before school starts, and the spiders proliferate.
What I haven't figured out, who is that following the Dirt Dobbers around. A dobber, when it is being trailed by the mysterious flying stranger, will make a circuitous trip to try to lose the tail. It is hard, since it takes time to get a spider into the nest, so when the stranger catches the dobber, the dobber flies away on another circuitous journey to try to lose the stranger following him.
Those of you who have not seen the following stranger, look closer, especially in central NC. It could be an enemy species, or it could be the male of the species, but I think it is a different species altogether.