Hearthpwn

I've heard at least one pro streamer (Kripp) suggest that players who do not yet have the cards that will move to the Hall of Fame should now craft them (preferably golden), get the full dust refund when the season rolls over, and then either kee the effectively free card or disenchant it for even more dust.

That makes sense and is very enticing for my F2P account. But before I sink my dust in this, I would like to receive official confirmation that this is fair use of the game mechanic. It it is seen as abusing a mechanic to gain an unfair advantage and potentially even punished, I will not do so.

Can we get official confirmation from Blizzard as to whether this is allowed or not?

Thanks!