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Yes, absolutely - blockchain is one of the most unique and valuable aspects of steemit to people like indie journalists or any 'citizen investigator' who goes into subjects that are radioactive in the 'legacy press.'

Although flagging may technically allow some type of silencing, it would take time and money to put into place, and the work still cannot be altered by an outside party and that is huge.

I hope that Steemit will grow even stronger in this regard as it matures. I have high hopes for the platform, for sure! :)