Never said wasting ammo was a bad thing. Have done some of that myself. I over reached saying the "up to no good" thing.
There's only been one use of a bump stock that I know of that was for no good. Should of said don't know what good they are for (ok, fun aside).
Could somebody school me on what they are used for?
Hunting, maybe trying to bring down a group of flying quail?
Target shooting, better have a big target.
Bringing out the manly-man that full auto shooting does? I know all about that, having carried a M16 for 18 months. Glad uncle Sam was footing the bill for that ammo.
Again, using this logic we don't "NEED" anything more than a single shot pistol, rifle or shotgun. It is a dangerous precedent to allow someone else determine what rights you "NEED".