Pretty much every player has done something like that.
But again, he was blacklisted before any of even these marginal allegations were proven. And the actual allegations Magnus accused him of and that followed him for years has absolutely no evidence other than Magnus not accepting that Hans could beat him in a highly controlled over the table game.
Also, he continued to be punished in ways that are outside the actual punishment that was given to him that are not official but are being done through winks and nods between Carlsen and Hikaru and tournament organizers who don’t want to upset them.