Usually when someone uses resource hack on gr you can see it in the achievements (check economy tab and tribute sent), but today I played a game where a player had 10 villager high and was making pala very quikcly. I checked achievements but the hack didn't show up under tribute sent (you see xx tribute sent, but no one recieves it). So I will never play on game ranger again, since there is no way to spot that hack. Someone could use that without being so obvious. And in general there are a crapload of hackers. I checked if cheats were enabled and they weren't either.