This feature seems unnecessary. Why don’t you implement this yourself? here are my points
Surely this would have many security problems and exploits attached? Again, this could be implemented by yourself using commands or CMDR
This would have technical limitations, and could be used in exploits to stall usernames / other malicious purposes.
This would be a problem. The way developers handle datastores differ and this would not work out so well.
TL;DR: Do it yourself. If you need to hide yourself on the player list, disable the player list and re-use the core scripts. I have attached the code responsible for the player list below
PlayerListCode.rbxm (86.8 KB)
(It will need to be modified)