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When you created your account, it was made very clear that you have to maintain and secure your private keys. Blaming others or the network or steemit, inc is not consistent with how things happen on a blockchain. They didn't steal your daughter's account. The key was somehow compromised and that could have happened with any cryptocurrency. I would like to know exactly how the account was hijacked though. Concerns about bots or the economics of the system (which there is discussion going on about changing) has nothing to do with your account being compromised.

I'm sorry the Steem blockchain didn't live up to your expectations. Do you still have your owner key or master key for your daughter's account? If the attackers only have your posting key, then you can maybe still get access to the account. You change the posting key with either the master password or active key.

Owning cryptocurrency is like owning property. IMO, it should be looked after and protected. Checking in on it is important, especially in the cryptocurrency ecosystem where things are changing constantly. If this was noticed sooner, maybe the account recovery system could have avoided this. Letting the account recovery system go beyond 30 days would introduce systemic risks which might put other accounts at risk and is not a good idea, IMO.