I had a highly upvoted comment about this whole thing a couple of days ago:
https://news.ycombinator.com/item?id=28069528
I have come to one more nuance about the viewpoint. If people are spreading CP by signing into the same Apple account from multiple devices and using iCloud to automatically share the photos, I think that's a different situation than a single person signing into one computer and one phone that are mostly used on the same networks together.
Not that I've really changed my view that I wrote before, just there is a bit of grey here.