Your account is either compromised by the fiftysats hacker (@fiftysats and @superheroes) or is trailing someone whose account is compromised. Check all of your transactions and if you see anything weird you need to change keys and redo all posting authorities. I'd recommend getting off trails until the exact source is figured out. Anyways, the mack-bot downvote is removed. It doesn't post up responses to keep the spam down.