This project really makes sense on the assumption that a Steemit user might be handling multiple dummy accounts. Why wait until the last minute to upvote your friend's work or your favorite authors' or any post you really like? As far as I'm concerned, there's nothing wrong with supporting and voting someone early/almost late (unless there's a hidden agenda). -Sometimes you see a good post at the last minute and you're glad you can still upvote it and the voting period is not over. I hope this kind of last-minute voting won't be flagged. I mean it should be for habitual offenders only.
Yes, identifying repeat offenders will be important. I agree.