I think this would need someone to develop it and the server doesn't currently have full time developers. Would it not hide players in PvP as well without some playing with the code? Or is there something to prevent that already in the plugin?
No support. Imagine having it in pvp you could run away from a player click on the item or type the command and you're gone it seems like a good idea but it could be abused in many ways
If you haven't ever played on a server with this, This is how it is used. You either do a command or right click an item. it will only disable players for YOU So only YOU Can see other players. if your PvP opponent right clicks the item or runs the command, only THEY won't be able to see you. What do you mean?
I'm pretty sure Cyp has a plugin to help that. On hellblock, If you do /warp PvP and then you try doing /sb out of the safe zone, it won't allow, so maybe in the PvP arena we can disable that.