We will have no problem to reimburse this amount to the accounts that are affected.
We are looking into the problem now to fix this for the future. Withdrawals are temporarily disabled to stop any future attacks.
Update: The security has been updated to address this issue and funds have been replaced. All users are required to reset their passwords.
Withdrawals are still disabled while we do some further tests, but if you need a withdrawal urgently please simply message me
How the hell are you even going to prove anything? Bitcoin is barely even considered a currency, it's more like an "anonymous internet collectable"...
Besides, you're using his free service at your own risk.