Earlier quoted context omitted.
> The problem here is […] I categorically refuse to accept that sort of thing. It is a perceived problem specifically for you (and, based on the arguments presented so far, it appears to solely based on the personal dislike rather than on objective grounds). If you refuse to accept it, that is solely your personal choice, and I, for one, have no objections to you being able to exercise freedoms to make your own choic…
I think the thing you're missing is that the spam countermeasure we're talking about relies on the sender's phone being locked down, not the recipient's. If spammers can get around this by just using non-locked-down phones, the whole thing is pointless. It only works if you require everyone's phone to be locked down.
If an identity can be verified via a presented assumed persona (supplied as a proxy for the identity in question) as a third party identity verification service call, locking down a device becomes redundant (although the hardware vendor will likely continue to do so for other reasons). It does not seem likely that the identity management is going to be solved any time soon though.