There's this game that's kind of like Rust called Reign of Kings. The general principle of the game is that you collect resources and build castles/houses to store your loot in. There's also this big castle thing that you can crown yourself 'king' with and collect taxes from all the lowly peasantry, but I digress:
I made friends with some guy on the game and started a two-man kingdom with him. We built a massive stone castle on the beach, and I was tasked with adding something to the side. I decided to build an intricate, two-story dungeon with individual rooms containing individual steel cages that I could store prisoners in. After I finished building it, we naturally had to find ourselves some prisoners to truly 'complete' the dungeon.
We made ourselves some steel shackles and started running along the beaches looking for targets. We spotted some guys harvesting logs along the beach and before long we were hauling their immobilized bodies across the beach back to the castle. After locking them up, one of the prisoners was especially pissed because he didn't have a sharp rock up his 'starfish' slot (which would enable him to bash his own head in and commit Self Delete) and the server had the Self Delete command disabled as well. He would have to either get us to release him or wait a long period of time for his hunger and thirst bars to drain and kill him. However, he wouldn't shut up about getting his friends to come raid us, so I had to get him out of there.
It seemed kinda unsatisfying to just kill him since that's what he wanted, so instead I called up my friend who happened to be the entire king of the whole damned realm with a massive fortress and an even more secure dungeon. Before long, a couple of his guys came and I handed over our prisoner to them, where he was presumably locked up in an even more dark and secure cage on the other side of the island. As for the other guy, we put in him the stocks, whipped him a couple times, and then played javelin archery until my friend threw one straight into his face.
tl;dr: built a dungeon, captured a guy, sold him into slavery, flogged his buddy.
if this seems harsh, this is kind of the entire point of the game. it's essentially just a rust clone where competing groups of players figure out different ways to screw with eachother.