What the staff should do is just add the command /afk instead of letting the server decide if the player is AFK or not. An incident happened in KitPVP once. I was chasing down a guy and he immediately stopped right in front of me, and the server put him as AFK. It was ridiculous because no one could kill him. I've also played Infected and CTF where players are AFK, and in Infected, it is not fun at all when there's an afk player on the Human side.
Just get rid of the plug-in and add the command. If they spam it, add a freakin cooldown timer to it. Just make sure it cannot be allowed in any of the mini-games.
+1