I'm not sure that really addresses the issue either. People running smurf accounts want those accounts to be low-ranked. Keeping them unranked or silver for more games would just be encouraging them.
Unless what you're getting at is segregating new accounts into their own player pool for a bunch of games. The big downside there is you're punishing legitimate new players by putting them in a super-low population group which would make it really difficult to find games.
I'm not a fan of people running smurf accounts, but I don't know if there's a solution that doesn't punish legitimate players as well. I'm also not sure why anyone would run a smurf account in WOC this year anyway. If people want to play low-ranked players, just search for a club game. The matchmaking this year is feeding low-level teams into the meat grinder all on its own.