I got a suggestion for a new AFK mod on the server.
Basically, when a player wants to go AFK, they say /afk. They are now marked as AFK and it cannot be undone unless the player says /back or if they start moving around. When a round starts, if the player is AFK, they are killed 10 seconds after the round starts. If they start moving around; they are no longer AFK.
If a player goes AFK without saying /afk, they can be kicked for being AFK.