You can give the memo to anyone. If someone wanted to sell you Steem you could give them that code so they send it straight to your exchange account. The memo is just an exchange wallet address, just like @blocktrades is a Steem wallet address.
Are the accounts connected? Yes, like any accounts that transfer funds to each other. Are they the same person? That's impossible to tell. You can assume so, but you have no proof, only theories.
Tbh, even if it was @blocktrades, nothing really changes in how the socks are stealing funds.
Its about the deceptive nature of the act. Telling people you are ´new´ but clearly are not. Everybody with 6 braincells left can see its the same account. I understand you are blind for that fact, and you are likely not even the only one. Bless your souls though... Nobody stole anything, its still on the blockchain. Some restrictions one some accounts, the most have their withdrawal route to bittrex so they will get their funds.
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