A new request I suggest : there is a list of friend. I suggest to also put in place a list of non-friend (enemies).
That will allow to add a bad player, a player who cheats, a player who breaked a game without reason... to a list of players that you want to be flaaged as "enemy".
With this list, when you join or create a game, an enemy would be flagged and so, you can decide to not join the game or exclude him of your game.
No one wants this feature ?