I don't know enough about the blockchain itself to be certain he could, or could not do dirty things beyond 'curating with an agenda' to hush people he disagrees with. That would be where my larger concern would be. I get what you are saying, and I don't suggest he does not have the right to curate as he sees fit... but I think he holds a lot of power to act responsibly with his Tech position. If there are efforts to censor free speech about controversial topics that effect everyone, then ya know... like I said it brings into question do the people who created Steemit back that behavior? If they do it'll end up like a paid FB.