I'm sorry @nadejde, but I think you're missing the point. Is not a punishing system, At the base level, the private key is the only way to link the real owner. Recovering keys means someone has the power to just generate a new access for your account and that loses the whole point of being decentralized. We don't want a single entity holding the keys for us, thats the only reason cryptocurrencies exist. You can create new layers on top of the contract or app or whatever. Whats your app about that your need a decentralized blockchain in the first place?