At least bluff a little that it's going to be rolled back.
I am not good at bluffing and not going to. Let the chips fall where they may.
Also, lets say there is a rollback. Then what? Hacker knows bter account password. Bter will immediately try to transfer the funds, but so is the hacker. If they try to include it in the same block, I'm not sure what happends, but I think the transaction with the higher fee will be accepted. I'm pretty sure that will be the hacker.
Either way, rollback is not a sure solution eather. (Technically speaking, very bad idea overall.)