Of course he has no intention of helping the rest of the conference out, but this is far more than simple taunting.
He's drawing attention to the awfulness of most every other Big Ten school, getting local media in Madison, State College, Lincoln, etc. to bite and run stories about it for the next week. Negative recruiting by proxy.
Makes Bielema look like a smart man. Which is perhaps more impressive even than an undefeated season.