Let me shine some light to this idea from the other side:
I am one of those players, who regularly enters PVP2 with a farm -- its my alt-account that I would like to keep in Silver arena range. I don't use that account for my real PVP games, just visit the Oracle every day and play the predicted false god (for electrum or useful upped cards), which often results in a win, pushing the account to level 40 (Gold), so I need to "lose" some games to get back into 39-Silver.
So far, I thought I am doing someone a favor by using a farm for this purpose. I might as well put in a nasty deck, enter PVP, quite the game as it starts, I get my loss, but then you need to beat my nasty deck instead of an easy farm -- you might lose. Would you really prefer that solution ?
Just think about it and if you prefer, I'll make sure next time I put my nastiest decks up instead of a nice farm giving you free