NPC Slavery in FO4.
Some good slavery mods from FNV,
as a reference of what I'm talking about:
Slavery Simple and expanded by igli
to complement with things like
the CortexScrambler by Eldritch
and Slave Jail by Roger Irrelevant
You roam around, you enslave people, you bring them back to a jail,
waiting to sell them up to an NPC slaver for profit or keep them for... anything.
Goes great with what I've read about the new dlc:
With Wasteland Workshop, you can design and set cages to capture live creatures – from raiders to Deathclaws.
Tame them or have them face off in battle, even against your fellow settlers.
You got the idea.