A blockchain solution is unnecessary for this kind of issue. The question is did Reid author the posts or a hacker? You just need signing to prove that. If all

A blockchain solution is unnecessary for this kind of issue. The question is did Reid author the posts or a hacker? You just need signing to prove that. If all of Reid's posts were cryptographically signed, then a post by a hacker would be mysteriously missing a signature and the debate would be trivially resolved.