He is not even aware of this
Another thing is that there currently is no rule on their terms that warned against the use of multi-accounts either, perhaps the user hasn't even violated any of the campaign rule.
Summary: No cheating has occurred (according to Harkorede and Timelord), they are fine with 1 account being neg. rated and/or flagged and the story is very likely to be true. I ask CryptopreneurBrainboss to retract his rating and investigators to dig further into the history two accounts if they are willing.
I have tagged Pixyoxx (for the time being): https://bitcointalk.org/index.php?action=trust;u=882083.