@dansup @pixelfed My view is you should think beyond the technical aspects, specially in the current changing social media landscape.
Something that may seem trivial to you, like “phone numbers will be hashed before upload”, is I understandable for the vast majority of people, not because they are incapable - but because they aren’t invested in understanding.
When your app asks for the contacts list, many people may see it as another instagram-like, privacy-invading app, regardless of the technical explanations.

The question is, do you want/accept that fact or risk ?