> Does anyone want to explain why they think it's acceptable to install software on someone's computer without their affirmative and informed consent

This is not an accurate description of what happened. The information was in the release notes, which are several notches above EULAs for providing informed consent. Secondly, Debian doesn't install sotware, the user does. Debian helpfully provides the list of the packages and the versions before installing. There were no surprises here.