Will this work?

Code:java

        if (cmd.getName().equalsIgnoreCase("freeze")) {
            if (se.hasPermission(new Permissions().freeze)) {
                if (se instanceof Player) {
                    if (args.length == 0) {
                        if (!isFrozen) {
                            isFrozen = true;
                            frozenPlayers.add(pl);
                            pl.sendMessage(cPrefix
                                    + " "
                                    + ChatColor.BLUE
                                    + "Dont't worry, it's not a glitch, you're frozen bi$#&");
 
                        } else {
                            isFrozen = false;
                            frozenPlayers.remove(pl);
                            pl.sendMessage(cPrefix + " " + ChatColor.BLUE
                                    + "Okay, you may move now...");
                        }
                    } else if (args.length == 1) {
                        Player target = pl.getServer().getPlayer(args[0]);
                        if (!isFrozen) {
                            isFrozen = true;
                            frozenPlayers.add(target);
                            target.sendMessage(cPrefix
                                    + " "
                                    + ChatColor.BLUE
                                    + "Don't worry, it's not a glitch, you're frozen bi$#&");
                        } else {
                            isFrozen = false;
                            frozenPlayers.remove(target);
                            target.sendMessage(cPrefix + " " + ChatColor.BLUE
                                    + "Okay, you may move now...");
                        }
                    }
                }
            }
        }
        return false;
    }
 
    public void onMoveEvent(PlayerMoveEvent e) {
        Player pl = e.getPlayer();
        if (!isFrozen) {
            pl.teleport(pl);
        } else {
            Location l1 = null;
            pl.teleport(l1);
        }
    }
}

 

You should... oh I don't know, try it.

 

http://forums.bukkit.org/threads/how-to-freeze-players-without-having-it-look-glitchy.148549/
Use this ^