You could have fed the yellowjacket population too. When I finished extracting this year I set a medium super on the back porch (was done extracting it) and the yellowjackets were so thick the next day you could cut them out of the air with a knife! Took a closer look at the super and it was LOADED with honeybees, mason bees, flies, hornets, yellowjackets, wasps, bumble bees, and other weird assorted flying insects. The next day they were all gone and like Mklangelo said, the ground was littered with wax dust. Was kinda neat to see.