Considering some of the largest app markets are not run by US (or EU) based companies (e.g. China), the assumption of control is also a fallacy.
"If you make encryption-by-default impossible, the amount of unencrypted messages will increase, and you'll have gained those."
Requires you to monitor every message for every form of data, and assuming the false assumption that banning encryption increases the simplicity of finding messages, you would probably only find more things not related to what you are looking for. Only assuming you have control over all data channels, which even the US doesn't have.
On the other hand: This message is then flagged: bomb, truck, explode. While you could better be looking at other stuff like origins and communication contacts. These give a clearer view than the random words you will be picking up, even when they are encrypted.
In a sense 'maybe not'. This would violate the bell test anyways as you predetermine the outcome by writing it down. Someone already knows what is on the paper. This is thus also subluminal communication as the outcome was already determined at the start (assuming you traveled at subluminal velocities). The idea of the entanglement states that the spin of the electrons is determined at the same time which guarantees their connection, not the outcome of the spin.
Besides van Gaal being famous for translating the rich Dutch proverbs into English/German there is some merit to the first post. I've notices since moving from Zeeland (province, sparcely populated) to the Randstad (Near The Hague, city style) some years ago, that in Zeeland we used a lot more proverbs in common speaking language than people do in the 'city'.
"If you make encryption-by-default impossible, the amount of unencrypted messages will increase, and you'll have gained those." Requires you to monitor every message for every form of data, and assuming the false assumption that banning encryption increases the simplicity of finding messages, you would probably only find more things not related to what you are looking for. Only assuming you have control over all data channels, which even the US doesn't have.
On the other hand: This message is then flagged: bomb, truck, explode. While you could better be looking at other stuff like origins and communication contacts. These give a clearer view than the random words you will be picking up, even when they are encrypted.