This explanation does not change much: the flag is meant to affect reputation and that's how people mentally treat it: as a warning message to the author. And I have no message to the author, I just want to oppose those who upvoted.

Anyway, your reply only reinforces my point: if you say we already have this functionality (which I don't agree) then making it more explicit and clear to use, changes nothing. So if a change is proposed which effectively changes nothing - why are so many people against it?