He's got an army of bots. This abuse is old news on steemit. I've seen this happen over and over and over again in my 5 months here. All my experiences led me to this:

Here is the most efficient route I know:

1. Never talk with flaggers.
   

I wrote scamalysis because it's hilarious. I don't really care what he writes or doesn't write or how valuable it even is or isn't.I have a downvote button and I use it on people who make 20 posts a day.

This is a guy called hendrix22 and note the lie about 20 posts a day.

1. Upvote @haejin - A minnow like me only get 10 upvotes a day. I use half of them on @haejin and sponsored him on @steembasicincome This will negate the efffect of downvotes.

2. Withdrw support from the violators of NAP. https://steemit.com/steem/@berniesanders/join-me-in-flagging-haejin-46k-in-abuse-rewards content of the above article made me undo one of my witness votes and I will not use the voting bots related to these violators of NAP(rando & buildawhale from what I know)

3. Do nothing. Keep your calm and know to vote with your digital feet when a better alternative comes and steemit start looking like Bitcoin community.

You may also find some good arguments here:https://steemit.com/bitcoin/@haejin/free-technical-analysis-for-anyone-by-a-15-year-veteran-of-elliott-waves-and-chart-pattern-recognition##@vimukthi/re-noly-re-vimukthi-re-solisrex-re-haejin-free-technical-analysis-for-anyone-by-a-15-year-veteran-of-elliott-waves-and-chart-pattern-recognition-20171220t092622332z