You don’t have to. It will lock the session and instantly get an authentication error. You will not be able to switch users either, hence the lock will lose the functionality completely.
That is exactly how body and head work for us. Without the head, the body will not work, without the body, the head will not work. We can split to hairs, but that was not what i implied.
Isn’t the same for someone that asumes a greater responsibility ?
I carry no burden, there is nothing to ease for me. I already explained what happens.
Fedora used to have, for the logo, an extension and the user could change the logo: picture, position, transparency and size from it. Probably with minor changes that could work and installed instead of the manjaro branding.
Regarding the wallpaper, as i said, the default one is like that, a neutral one, because each user on one machine can have their own wallpaper and that will be rendered when the user locks the screen. The last user that locks it will have their wallpaper on the lock. Once you switch to another user, regardless if is logged in or not, when their user is selected, while at the password field, the background will be the neutral one from GDM. With each update indeed you will have to repatch that.