I thought this was escrow 101 - always make sure any collateral is 100% "in hand" before confirming that it is safe to send Bitcoin (when it comes to loans).
This is one reason I would never considering offering escrow services. If one party scams you then you are held responsible.
He had the collateral in hand, he made a mistake in not changing the email.
No harm done, nobody else got scammed except that redsn0w has to suffer some headache.
Why did the person who took the loan even take back the account himself ?
It is obvious that without repayment, he will get a negative trust and would never get a loan again .
That was supposed to be the last of the progressively higher loans, and I doubt it was intended to be paid back. Any loan after that is a bonus.