Considering repayment address is always quoted and given to each loanee, it's best you send out this update via DM or Telegram as you can't expect everyone to come here and see this update. And the fact you don't want to accept any responsibility of funds going to your old addresses those TG DMs or BCT PMs should go out as a preventive measure.
Have a great day .
But he clearly mentions here that he did send out a message to every person with an active loan, so clearly if the person ignores the PM and send then repayment to the old address then they should blame themselves. I can also confirm that i received a Private message from him regarding the address change, so no need to worry.
Note to all borrower I have already sent message to almost all the users whether on telegram or on bitcointalk even several people on both about the wallet change.