Diamond_knight has already pointed this out as an issue, and I think this is something that should be addressed.
This game has had a multiplayer cloud for some years now. I think this game needs to have a button in the pause menu that takes you to a Rules of Conduct page stating what is expected of players. Surely this wouldn’t be that difficult to put into the game, and I see no reason why not to have one.
There is already something similar to this on the forums. However, not many people use or even know about the forums. I think people need to at least be able to know what is expected of them if they want to, and not have to go on an expedition to find them.