Something like that in a contract would give me the heebee jeebies. Sounds like another fear tactic. And confirmation of what has been said--that he only cares about his gymnasts insofar as they bring him $$$ and/or recognition.
I mean, does he really have the time, energy, money, resources to sue the families of gymnasts who leave without 6 months notice?
And for those who actually give notice, I can only imagine how they are spoken to/treated. Especially considering how Lindsay Lemke said she and her fellow gymnasts were treated when things were "normal"