My PC is running back up right now. I'll post the signed message after it finishes and I figure out how to do it. If you feel you need to report this post, by all means, do what you feel need to do
Steps:
download eletrum wallet (from its official site)
open your wallet
copy the address to sign
click on tools- sign/verify message
write the message
paste the address
click on sign
copy the signature and share here.
You can't sign a message without the private key, if it was that easy, a certain satoshiwannabe would have done it already instead of forging.
And signing a message is impossible without a working PC, when someone gets hacked, they won't simply back up their hard drive, instead they'd take out any private key and wipe the drive clean.
According to his last message, he has access to the seed or private key, he just doesn't know how to sign with Segwit.
therefore he can do it with electrum.