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This story is slightly bonkers to me. First, Apple (anyone), my RSS feed is absolutely allowed to be included by any RSS reader. Second, not only does my publishing of a feed imply permission, anyone who publishes anything not behind a paywall, provides explicit permission.
An RSS reader is just another browser. Remember the great internet rule of privacy (content), if you don’t want people seeing anything you write, don’t post (email, photograph, record) it.