Bukkit

As the plugin is, players can drop kits and leave, leaving their items behind before the game starts.

I've fixed this by adding the following to the EntityListener. Pretty easy update.

import org.bukkit.event.player.PlayerDropItemEvent;

    }
    @EventHandler(ignoreCancelled = true)
    public void onItemDrop(PlayerDropItemEvent event) {
        Player player = event.getPlayer();
        GamePlayer gamePlayer = PlayerController.get().get(player);

        if (gamePlayer.isPlaying() && gamePlayer.getGame().getState() == GameState.WAITING) {
            event.setCancelled(true);
        }
    }