But still, people that are joining 3:1 war in early game, breaking alliance and backstabbing that way have something wrong with morality.
And yeah, in that game I got first attacked by a player that joined the game just because he lost with me in previous one and wanted revenge. And some time after I got attacked by an ally

You can get interesting people in newbie games.
I have no hard feelings, but I think that others should know who they are dealing with. So they can either join a different game or act accordingly.