I hope someone can help @jazzresin out. They are trying to stop their account being abused on both blockchains. Is changing keys enough or do authorities need to be revoked too? I think @hivewatchers should stop the flagging as they have made their point.

@themarkymark, is there a way to revoke Steem authorities from the web without Keychain? He's using an iPad. I'm just trying to help sort this out, but it's gone beyond my knowledge.

There are hundreds of accounts affected by this issue, but most have been abandoned.