[Smokin' Joe]

These keys in effect disable weapons and gear that is dropped, left behind or taken away from troops rendering them useless.

And eliminate the possibility of picking up a fallen fellow soldier's weapon and using it to replace your own in a pinch.

Might put a premium on hands, too...

[Quix]

Humans have persistently

worked around boundaries, locks etc.

other humans have put in place.

However, there are other ‘forces’

enforcing such in our era.