HN is explicitely not the place for political activism of any kind, however justified the cause, just remember that, than you are not enraged by it.
And my general point on this is: I'd like to see them try.
It likely will get softened up quite a lot, but if they really go through with it, they will turn lots of technical (or just privacy concerned) people into criminals over night. Good luck with that. I live in the EU, but I certainly would not comply to any of this. And if Signal will automatically upload images from me, than I will use 100% open source and decentral solutions like Matrix based ones. Might turn out good for that.