Well. is not impossible that cheating happen but is hard to do so in this game and this is why. If a file is modify it would cause the game to crash or a automatic kick from the game due to file not being the same from the cheater PC and others.
i have seen weird things but i would call it bug or glitch but not cheat and this is due to my long experienced with the Gem engine. and even up to now i have not seen one video that show a multiplayer cheat that works keep in mind i played this game from 2009.
But if you feel that something is weird and feel like is a cheat and you just want to add them in your block list but you can't remember the name of the players, hit the
before starting a game, it will take a screenshot and it would be save in the C: Documents\my games\men of war\screenshots