All it will take is a lawsuit from a big entertainment corporation, against Steemit, Inc., to force the sale of so much SP and SBD that all our holdings are worth nothing. While the blockchain may be decentralized, there is a centralized company behind Steemit. So we all have to take action when we see a problem. It's good that you mentioned steemitabuse.

Within Steemit.chat, there is also the #steemclears-linkdrop channel. You can say, briefly, what the issue is. But other than that, no discussion, just drop the link there. Here are their rules, taken from the pinned information on that channel:

#steemcleaners-linkdrop Rules

NO DISCUSSION!
This is for abuse links and supporting links!
Do not post more than 3 links reporting the same person. (unless they have high payouts)
Action taken is at the discretion of @steemcleaners
No links to personal disputes or content you disagree with

It's a constructive action that we can all take, right when we see an issue. You can get rewards for doing this, too. But the bigger reward is maintaining the value of Steemit and the time and money you have put into it.