playing to win is as a morale requirement seems a little unfair in my mind.
I mean, fine, as someone who has entered a game of dip it is done under the understanding that all players are interested in winning (and none are merely multi's or friends of other players who want to help them to win) But what if i change my definition of winning to getting as large a draw as possible. (because that requires convincing the most players to submit to not attacking each other and hence is the biggest challenge, and only wiping out those who don't go along with the plan, but i don't think this ruins the game for anyone because they still have the option of playing normally and winning if i fail. also i could be lying, but it's a rather difficult thing to win while pulling those crazy shenanigans...)
I do see the definition of winning as something which affects game-play. The difference between WTA and PPSC is really important for stopping a solo. So defining what you consider to be 'winning' is something which everyone should consider before they play a game, but what they will accept as a result may vary with time, so since a player can vary their goals mid-game i don't know how you can tell whether someone is playing 'wrong' (though my example of playing wrong can be found here: http://game.xbsd.kr/endip/board.php?
gameID=436&msgCountry=Global&rand=49457#chatboxanchor where i tried and failed to win the hearts and minds of my opponents...)