I won't say that it's a 100% or definitely scam attempt, but it seems so suspicious. Someone who has been gone for over two years, and his first post today after returning is a request for an $800 loan. I believe everyone should be careful and caution when dealing with this user regardless of how much trust he had before or his history. It's also possible that the account has been sold or hacked.
One more thing I noticed is that the USDT TRC20 address he provided for the loan has never been used by him before.
I haven't requested for a loan before from right when I got to the forum till now so I don't know how the loan processes in the forum works for anyone to be granted a loan but generally there must be criteria and rules to be fulfill to be eligible for a loan.
You don't just pop up from a nowhere to demand for a loan and expect to be given, be it $1 you're requesting for, be it he's the real owner of the account or not; equally in the traditional banking system it doesn't work like this. And am certain no one will take him serious to give him the loan he's seeking for. Better to be ignored.