On my server any players are duplication char.
I don't know how it works, but from what I've researched, players tie their hands and log out in some way so that when they return, the character is duplicated and allows access to the loot.
In this video you can see the final part of the glitch: https://www.youtube.com/watch?v=SW4sC5FQzXI
Players on my server: