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There are primarily two stinging wasps here that I know of. Yellow Jackets and the Black Hornets. The Yellow Jackets are most common and largely more aggressive, but both should be killed unless you are some kind of masochistic PETA type.

Both are predatory meat eaters that while they'll eat dead stuff, they seek out and kill anything they can, primarily insects. But, they don't differentiate between the good or the bad ones.

They are simply a pest that can kill a human but most human's aren't at risk of sever reaction when stung. **If your kids haven't been stung before be prepared with the proper antihistamines and monitor the situation. They can be fatal for some people.**

Be aware and watch them if you seem to have a lot. You will locate the nest eventually. When you do wait till dark when they are all inside and inactive then soak nest with "Wasp Blaster" or the like from Canadian Tire or wherever. Try to spray into the nest opening if you can. Done for that one but there could be others. Usually is somewhere.

Some years are worse than others. Nasty things that should be eradicated IMO. The extent to which they pollinate is limited if at all and can be left to the more gentle and more abundant pollinators.