Inspired by an annoying user from Brazil the other day (you know what i mean, people who quit in the middle of the game and then expect to join your next game and won't leave) I have added a temporary block in the lobby for the server user. Once a network player connects to the game a 'Block Player' button appears for each connected network player. To block this player for the new game only (temporary) click Block Player. To clear all blocked players in the lobby you can click Clear Blocked Players.
Its a sad day to implement this feature, but I knew it would come none the less!