I believe full-auto can be a fun thing, though I've never had the privilege of shooting one. I also believe ownership of almost any weapon should be legal. The misuse of weapons can be criminal, but ownership and safe use cause no harm so, IMO, should not be banned.
I once worked with an individual who was a cannon enthusiast. Not replica cannons, though these exist, but just cannons he made in his basement. Apparently a group got together somewhere in eastern Oregon and tried to hit 55gal drums at a ridiculous long range.
He got tired of the price of lead, so he made one with a bore that would fit Snappy-Tom tomato juice cans. If the can was half-filled with grout, it made a decent projectile, with the open end acting as a gas seal.
Every time I read about people having harmless fun with guns, or oppressive gun regulations, I remember this guy. I hope our future permits this kind of free-spirited fun and doesn't criminalize it.