I have had my share of stings over the years from these ground nests. Yes, they are not bees, rather wasps of some kind. But, I don't really care about the label, but do care about staying out of their way.
I have learned to know the areas they are prone to make nests, and what weather and soil conditions are best suited for them. And, I'm sure that my observation meter ratchets up a notch at this time of the year -- just keep an eye open and investigate closely an area that might be supporting a nest.
Customer are different. In nearly all cases, they have no idea about the existence of a nest. They are rarely out walking in their yard. But, the interest level is markedly different. Some will want to know and make a point of making an expensive call to the exterminator to get rid of the nest. Others want to take it upon themselves to rid their yard of them. They spray a time or two, but rarely are effective. In the end, "... I thought I took care of them, ... sprayed their nest one time." Usually, these nests are not eradicated. Actually, even professional exterminators are not 100% effective.
Others could care less, "... just mow around it." They aren't out in the area, and have no interest in being involved.
In some cases, I never bother to inform the resident of the nest. The nest will bother nobody but me when I return next week. But, I know enough to mow around it. I know they will do nothing to eradicate it anyway.
If the nest is in a remote area where other wildlife exist, a skunk or raccoon will dig out the nest, looking for the honeycomb. The predictor approach is almost 100% effective -- having the nest dug out of the ground, in search of the food value of the honeycomb -- almost always results in a bare nest.
As a remedy after the sting, ... somebody sent me a circulating e-mail about handling a sting. The suggestion was to tape a copper penny over the sting for at least 15 minutes. Now, I've never tried this, so cannot comment personally on the merits of the procedure. However, this same person sent me another e-mail recently. Her young daughter had been stung, and she followed the penny procedure. She claimed it worked well. Anybody else know this procedure, and if so, is it effective?
Obviously, we all respond differently to a sting. For some it hardly matters. For others, it can create a significant problem.