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There are several ways to do it. A process can flag all comments whose entire text is one of "Good post.", "Nice post", and people can delegate voting power. Another idea is that people have to come to an antiabuse page with a list of comments and can flag all with one click, or maybe select some. If people leave posting keys, then it can do all the flagging without intervention but that creates a honey pot . I judge nobody badly if they like the last idea, because I leave money on exchanges. There are merits in these designs but I feel the bestnis yet to come to me.
[I thought my ptevious reply failed. So I wrote this one]

Thank you for clarifying it. I will think about it.

I think the software's best design is that it scans the blockchain for such comments and people delegate voting power to let it flag. There is no need for uses to come lend thier key daily, and no storing of private keys. One time use of a key is superior to having the users enter it multiple times or storing keys ( shudder )

Well, actually a newbie can write it before knowing that it's considered spam. I flag when I see tendency, but when it's one time comment - well, everyone can make a mistake:)

Agreed^

The first couple of weeks on steemit is a steep learning curve. But anyone with a rep over 35 should not be begging for f4f...