Would it be wrong to leave a negative trust feedback afterwards, now that negative trust doesn't mean that someone is a scammer?
Well although leaving a red trust does not effect like it used to be but if kenzawak get the account back and can prove that he indeed got it back then I do not think it will be appropriate to leave a negative trust since it's with him the original owner.
May be a neutral can serve as a reminder that the account was hacked twice but now it's with the original owner.
Partially my fault, partially kenzawak's fault (after all, they got hacked twice in a short period of time). I'd probably ask for half from him, he'd state that he's not here to trade and deny all responsibility despite being on DT1 with positive trust feedback. We'd carry on with life afterwards.
Still it's very unfair for both the lender and the original account owner who did not actually request the loan. What if the original owner does not have the money because the given some was very large amount.
The only way I think is very safe for both party is the requester signs a message with their BTC address
every time they request a loan.