@annaleen I think it has been overlooked that you can already quote post by including a link to the original post.
I've been a journalist for over twenty years -- I've written for venues ranging from tiny zines to the New York Times. And I think users should have control over quote-posts. If a journo wants to report something that they can’t quote-post, I believe that the ten-second friction required to cut-and-paste some text, or to screengrab it, is helpful to the journalistic process. Taking a beat to consider whether we really want to quote something, and how we want to frame it? Literally our job.
Inserting the link to a toot at present does not notify the original poster, whereas a good implementation of Annalee's proposal would.
Of course, bad actors could still avoid notifying by using a screenshot or a link, as they can now. But benign users of QT would be happy that the OP was notified.