Yep, this is on the list of things to fix. The (minor) trickiness is that, since you don't have a persistent connection to the server (that is, the game reconnects to the server each time you load a game or send a turn or fetch new games or whatever), the server doesn't "know" when you're actually in-game. But I think we can work around this by simply putting off sending "your turn!" emails until your account hasn't made a server request for X minutes or whatever.