When a player who obviously doesn't know what they're doing is about to make a move and get you both killed there's no way to communicate with them and tell to knock it off.
How about at the very least a "that's a dumb move" icon? Or something that let's players know they're being stupid?
That's the trouble with not being able to communicate with players it's hard to tell if someone is cheating or if the player by using two accounts of if a player is just that terrible.
I just lost a game because a player just sat there and let another one take NA and SA. Didn't even try to stop him. Just sat there with his troops parked in SA while he slowly tried to take over Europe.
The dummy cost us both the game and I had to just sit there and watch it.