I am the steemian behind this account. I was brought here by a few friends of mine who are steemians. A couple steemians have keys to this account. But it is mine. If you send me your government ID, proof of address and conformation of telephone, you may have mine as well :)
As for the key lending, I see it like anything else I own that has keys to it, I can loan the keys to my house or car to people I trust to use it, but it still remains my house, my car and my account.