According to latest Yoshie research we may even have the case of ban evasion here because HarHarHar9965 was banned and archived in 9/28/2019, and I think people will find more accounts connections.

Credits should also be given to Timelord2067 who first found some connection with his accounts back in 2017 related to some piratcoin pump and bump:
https://bitcointalk.org/index.php?topic=1702409.msg17520054#msg17520054