They could make it difficult to open up the camera and extract its signing key, but only one person has to do it successfully for the entire system to be unusable.
In theory you could have a central authority that keeps track of cameras that have had their keys used for known-fake images, but then you're trusting that authority not to invalidate someone's keys for doing something they disagree with, and it still wouldn't prevent someone from buying a camera, extracting its key themselves, and making fraudulent images with a fresh, trusted key.
afaik KDE still doesn't have any tolerable way to tile windows on wayland
if i need to open a menu to set up zones you are doing it wrong. if i have to pick from premade layouts you are doing it wrong. pop shell on gnome would be perfect if it wasn't married to gnome and slowly rotting over time: i can pick up a window, drag it to where i want to put it in the binary tiling tree, and it goes there.