Hi,
I think you are taking the right approach here. I'm seeing quite a few negative comments and users who think combating bots with bots is not a good solution. I will grant them that it has its own issues, but it simply is not possible for human steemit users to manage the constant bot spamming, let alone monitor for plagiarized posts. The problem is only going to get worse and I applaud you for taking steps to help solve it.
Additionally I believe it is wise that you are not automatically downvoting posts flagged by the bot. Bots are stupid and will get it wrong sometime. Imagine the sentiment amongst users if your bot downvoted legitimate posts. It would not be pretty.
I also think the proposed change at https://github.com/steemit/steem/issues/176 that you support would have a huge positive impact. How can I help to influence this decision?
Great work!