Please do not kill the dragon flies. Lots of kids are afraid of them thinking they are flying darner needles. They are not.
But they are using you as bait. Dragonflies eat mosquitoes, gnats and such. The skeeters are attracted to us with carbon dioxide, which we exhale, warmth, and usually light. Artificial skeeter traps have the CO2 emitter, warmth and light. So the dragonfly won't have to hunt for the skeeters, they will be attracted to the human and are easy pickings. They can eat their weight in skeeters.
I'll answer any bug questions....except the classic: what bug is small black and shiny. Lots of them. Gotta see it.
Marcia