On the IPFS level there will be “denylists” explicitly for this purpose, but AFAIK there are no specs for it yet.
I made a quick summary on this here.
My intuition is that each content ecosystem will apply multiple blacklists from various places, but ultimate control over what is blocked will be in user’s hand (she will have ability to disable blacklists, always).
This is a good question. So far I’ve been thinking about Filecoin in terms of paying for data storage, as stated in this interview:
Not sure if Filecoin alone is the right tool for incentivizing journalists, nor how such mechanics should work.
Perhaps there is an open niche for something like distributed version of Flattr?