feeds.imore.com/~r/TheIphoneBlog/~3/g9-oDLbyLZc/how-delete-and-opt-out-siri-and-dictation-audio-recording

Whilst Apple are not perfect, they are certainly trying to be advocates for privacy and this is another step in the right direction… If you value your privacy and you’re a user of Apple products, you should do this immediately.