I'm currently on a systemd based Linux distribution and while reading documentation, I noticed that hid devicecs such as keyboards and mice are not tagged with "uaccess" in 70-uaccess.rules. Is there a reason not to do this? It makes sense to me that remote users should not be able to access these local devices.
My current understanding (from reading sparse documentation) is that any devices with the uaccess tag lets systemd (or pam?) know to give acl permissions for that device to locally logged in users. Is this correct? I couldn't find any documentation on what is actually responsible for setting the acl permissions, once the tag is set.