Non-technical people I&#x27;ve introduced to Signal on iOS stop at the &quot;upload your contacts&quot; stage and go &quot;I don&#x27;t want this random little company to have access to my contacts&quot;. These are non-technical people who understand the importance of keeping their contact list private, and there are a lot of them.<p>Making it a de facto requirement that users on your network be personally identified via a phone number (&quot;get a burner number&quot;? really?) and that you have a copy of their contact list and phone calls, all within US jurisdiction, means mass metadata surveillance a single judicial order away (as it is now with the telecoms).<p>Unlike POTS, Signal prevents phone taps, yes, but it does not hide your social network, and so does little to provide you with the ability to associate with someone anonymously.