Here's the weakness in this plan:
After you've caucused uncommitted and voted for literally nobody on the first ballot, you then vote for the same schmuck who made nice promises to you four years ago and now won't even do that. You don't use the opportunity to make a scene and disrupt the convention because that's not part of your Serious "inside-outside" (meaning inside) strategy. And you don't walk out and organize against the Democratic Party for a decent candidate like Rocky Anderson or Jill Stein who won't kill us all, because you could have done that from the start without wasting a half a year.