this situation with the harassment could potentially highlight another potential of such blockchain platforms like Steemit, that being the dynamics of the identity component...
anyone is free to parade around on YouTube, opening a psuedo-account to troll away... I think eventually, once the identity component really gets strongly integrated into the next evolution of platforms, it'll go a long ways towards deterring from such harassment and trolling, because the account reputations would get knocked down to nothing and leave a permanent mark - either providing serious reasons to NOT troll, or self-censor their own shit comments due to negative feedback.
may be a ways away, but just sayin'...