This happened in a British colony (India I think but not sure). The government tried to fight poisonous snakes by offering reward for a dead snake. Locals started to breed these snakes and turned them in to the government.

The “Cobra Effect” Wikipedia article has a nice entertaining list of them.

https://en.wikipedia.org/wiki/Perverse_incentive

Wow this is basically a list of shame about poor government decisions.

"Tax the rat farms" - Havelock Vetinari

This happened in Houston, TX too.

https://www.chron.com/news/houston-texas/article/Houston-3D-...

Crazy but aren't these just props?

Nope. Most of the guns in that box are Harlot derringers with a few Liberators. Neither design is one I'd fire without carefully counting my fingers after each shot, but they do work.

Let's chamber a round and see.

It seems to depend on what ATF regulation you want to look at. A lower receiver, according to the ATF, is a firearm and needs to be regulated.

What these gun buyback stunts have further illustrated is just how much of a patch work mess the gun laws have become.

I mean... Check your links.

https://futurism.com/the-byte/3d-printed-guns-buyback-new-yo...

Maybe gun buybacks ain't so bad after all.

3D Printed guns are Ghost Guns because they have no serial number. Also made of plastic so metal detectors cannot detect them.