The worst idea that mankind ever came up with could be Landmines, Not because they aren’t effective, but because they get left behind.
They are many thousands of landmines sitting under the dirt waiting to go off and contrary to what movie said, A landmines doesn’t click and then explode, it just explodes taking you and Any one nearby with it.
A buried landmines can be active for more than 50 years after being placed.
Many mines are still floating in the ocean waiting to sinks a chips.
In Ukraine, they have been finding this.
They are butterfly 🦋 landmines and extremely dangerous, Russia place them.
So at this point they need to be sort of agreement to stop using them in warfare, they kill people decades later. It is a dirty weapon