I asked why there was a metal thing on the powerline where I was hunting. Buddies dad shot the dang thing in half a few years earlier. Cut the power to the ranchers house for a day before they could splice it back. It can happen. I know some hunters shot one down near Abilene a few years ago. Think it started a fire and made the news.
I always make them fly off of it before shooting personally though a 15 bird limit skillet sure has been tempting!
I had a hunt where every bird would stage on the powerline before dropping to a tiny puddle from a broken water pipe but I let everyone wait its turn. They can be dumb when never shot at.