This discussion about privacy supplements my other reasons for using cables to sync or load rather than wireless or cloud-based methods, and to avoid vender-supplied sharing options. Which are (1) Keep it Simple, and (2) I'm simply old fashioned. Which also happen to support maintaining privacy.
But since metadata download gets stuff from various online sources, and I assume my network address is involved in that, my basic privacy doesn't exist anyway. One of the best metadata download sources is Amazon. So until I stop downloading metadata from Amazon and other sources, my privacy is blown. If my assumption about that is wrong, please somebody let me know.
PS. And my internet provider knows where I've been and what I've been doing too…. If they want to.