Moving the flag button on Steemit would be a good move. Some of the other dapps make it even less obvious how to flag.
I think blacklists can have a function if the vote sellers work together to deal with abusers. Obviously need trusted people to manage them, but I don't see the harm.
@heimindanger is bigot trash who refers to people as "fag". Look at his comment history and you'll see just what a piece of shit he truly is!!