I think they will not do anything until the legal owner is determined or their legal advisors tell them what is best for bittrex.
The legal owner can't be discussed in terms of law, I think is very clear who are the legal owners, the blockchain policy or the rules of it don't apply in that matter. That's why this kind of statement from Bittrex that seems to be more of the sockpuppets side is dangerous for Bittrex.
As you said perfectly could be considered complicit to theft.
And that’s why they will play it safe.