@colo_lee @kissane I think that fine-grained permissions on people's content on the fediverse is probably helpful. I would not put that flag on my own content.
I think if you're trying to block anyone on Threads from reading your stuff, we have the tools for it right now. I don't think we have the tools yet to say, "I won't allow the following re-use: ...". I think it's possible to get it started, though.