Dear @jaki01

I think your idea is very centralized (even more than mine) and conflicts with my ideal of censorship resistance.

i agree. it's very centralized. however downvotes already has been proved to create more tension, dramma, killing userbase and it's simply not working.

I've few good friends, who are right now "milking steem" like crazy. And when I asked them if they aren't worried to be downvoted - I received interesting answer: flaggers will get bored sooner or later.

That's the problem. Those who abuse system, they go "quiet" for several days after been downvoted and then they are coming back. Perhaps unnoticed. Or they simply carry on, knowing that they will win at the end of the day.
@ haejin is great example.