Yeah it's all crap, other US exchanges aren't restricting you to 0 BTC withdrawals
without warning if not fully verified.
If Bittrex had taken the time to email their user base and clearly outlined their new draconian verification requirements well before they implemented them, would could have withdrawn and be gone to another exchange. Instead the took the sociopathic approach with little or no regard to the impact on their users.
Don't get me wrong, I understand the requirements governments have for fiat transactions. But Bittrex doesn't do fiat, even if they did, the fiat verification requirements shouldn't apply for crypto.