I don't really care about signed message. Not sure I understand its importance.
All it proves is that an account was not hacked?
That's negligent and could lead to a lot of problems, in case the account has actually been hacked.
I just want to recall the issue Altcoins4life/Murderouskirk had a few weeks ago.
Always ask for a signed message from an old staked address.
You might not have had any problems regarding that, but believe me, the moment you do, you wish your standards would have been higher.
There is no neg trust from it being hacked!
Therefore it is not hacked, otherwise the previous owner would have left a note.
Not enough, maybe he didn't notice it yet?
That being said, since the account requested a loan to the same address 7 days ago, I don't think it has been hacked.
But as a general rule, better be safe than sorry.