As much as I am sorry for your loss of money, I don't think Steemit is at fault here whatsoever. If you gave me money, by mistake or not, it was your choice, and nobody should regulate that. And any account name that does not exist should be allowed to be created, or this limitation will expand. Would you forbid bi11rex to be created? or 6ittrex? or whatever... they're still similar...
Nasol boss, da nu-i vina lor...