Try this one.
Address: 1Bd6Kx2emUPME5UGeqJa9MnZvUvbm11V2K
Message: Try #2 - it's sinisuba from bitcointalk.org, 26/08/2016, looking for a loan of $5.75. I will repay the loaner $6.50/6.90 in 2-3 days.
Signature: HLXnje32sTWUXvi63JOL0VpZ/uxr0zH1MNTfTsM7ox7Md0cuGjwZ5vN27/zlR5pUSOIXYt3hqk8b5gJvFzmUlD4=
i will fill this loan ...sending btc
Provide your repayment address when you do.
Edit: received, will repay in 2/3 days.
Op, it will be wiser imho, to lock this thread of yours until you repay your loan.
When and if you repay, you will open it again.

Why would that be wise? It would mean that there is no place you can talk about the loan if he defaults. The only time a loan thread needs to be locked is if the borrower didn't get his/her loan accepted.
If a loan defaults, why you need the thread and talk?
You open a scam accusation thread and talk there.

I agree also for locking a thread if the borrower doesnt get his loan but also if he gets it.
I dont know if its a good thing when the borrower give his account that open the thread, as a collateral...

Should lender use the account and lock it?