users of apps with a communication function would have to agree via terms and conditions or pop-up messages that all images and videos sent to others will be scanned automatically and possibly reported to the EU and the police.
This is more like coercion than consent.
And let's be clear: The goal of legislation like this is not to allow investigating child abusers, which can already be done legally. The goal is to impose mass surveillance on the population, circumventing due process.
I am just sad that the desktop version is not as full-featured. The website says no Tor bridges, which here means no Tor connectivity at all. And it is weird that the mailbox is primarily for phones, even though phones are not supposed to be working permanently on a charger - they do have a cli one at least so you's probably be able to use something like a Raspberry instead, for now only buildable from source but hope it develops. But yea, very cool model! Although I would say for everyday less sensitive communication I would choose XMPP or Matrix instead.
I'd vote for testing this mass chat control on politicians and CEOs of the companies that want this mass control. Let's say for the next 10 years? Or 20? Pretty sure the results will be great. For people, for justice, for democracy.