Is Steem vulnerable to this?

This article says that proof of stake coins that derive from btc are susceptible to fake stake attacks.

I dont think graphene is one of these, but i don't code.

I think the only fake stake attacks we are susceptible to are from those that appear to be invested but really couldn't care less.
It appears that the average steemizen may be more easily appeased than me, but i need more than lip flapping.

When does proof of brain come back?

When do we return to the first rogue community actions that spawned the stinc hijacking of the code?
When the responsible whales stood up and put the kibosh on whales sucking up all of the inflation, stinc backed the abusers.

Dont forget that, steemizen.
The memory hole works in favor of the abusers.

Many of you reading this think linear reards are the norm.
You don't know what it was like when each following vote counted for more than its own value alone.
You dont remember 24 hour and 30 day payouts on each post.
30 days to find a post and it still get rewarded by your vote sounds better than just seven, yes?

Stinc forked out the 4 post rule, too.
The 5th and subsequent posts lost rshares.
Our highest rep account wouldnt be there absent stinc stabbing the community in the back for their own benefit.

Do we know, for sure, that the first 30k accounts arent 99% sock puppets?
We do know that noganoo had 80k+, at one point.
We do know that ned seems to be a control freak and not above dispersing enough stake to troll any forks.

Don't fall prey to the same tactics as before.
Demand that stinc restore us to where we were before they took us off the rails.