@gamey Keyword: #FediPact – all the social graph of interactions from our rather privacy-oriented networks would become fully accessible to MAGMA.
I kept out of their realms for a reason. I don't want to be dragged into that "indirectly" now. Bad enough that everyone using WA and having my number in their address book already ships that there, without my consent (and often even despite my explicit dis-consent). No need to worsen that.
@IzzyOnDroid One thing the matrix people made very clear is that a phone numer wouldn't be a sufficient identifier but I get what you worry about now. If your contact writes you through Whatsapp in the future that will expose metadata about your Matrix account, I think it's a worthwhile tradeoff for the possibility of that interaction in the first place tho and the exact implications will depend heavily on the implementation!(Should hopefully need your consent for any further data than the nick)