Do you use hair spray? That's an old trick for yellow jackets...spray them, their wings get stuck together, then they fall on the ground. Proceed to step on them and you'll be on your way. They won't be trying to steal a bite of your bologna sandwich then.
Yellow jackets are what most people call "bees..." They are actually hornets, just so you know. They are the little nasty "bees" that always hover around you or your food and zigzag in the air.