In the whitepaper, it suggests that flags were created for fair scoring, as a downvote, but the abuse of using said flags has become evident. There was never a clear explanation on how someone was going to use a flag, and there's no justification for when we do, because we each interpret it differently. I think that's why the people who consistently downvote posts seem contradictory. They themselves have no real justification for how the flag is supposed to be used.
I think people need to ignore flags altogether, unless the piece of content actually puts the platform in jeopardy. We can just easily negate rewards by retaining our own vote, just as you would by downvoting a piece of material.
Thanks for resteeming :D