It may be dumb that he's doing it, but maybe he's showing users what you will now be facing all over the place. And yes you should probably downvote him. I'm guessing he wouldn't mind and would be proud of you guys for doing it.
Maybe he's thinking how long are these steem users going to allow me to do this? Why aren't they downvoting yet?
So why aren't you? Do it, get others to do it. All those protections to the Steem reward pool for years have been by some of these guys. Now they're gone. Take it into your own hands now.
I'd suggest a post in Korean.