The Sand Wasps are pollinators and solitary. I did enjoy watching the Kingbirds taking them out of the air when they were going after the Russian Olive blossoms.Wasps and bees are not the same thing to me. I would kill a wasp in a heart beat!!!
I have no idea what it would take to get a sand wasp to sting. They have never offered to sting me even when I am bothering them when they are on a flower. They just ignore me and move to a different blossom.