so that should work, except that there is no entry in the keychain access. I even tried creating one and then deleting it, but whenever the mac is clicked on in the finder sidebar, and then you click share screen, i can still start the screensharing without need of a password
interestingly enough, whenever i click on the computer in the sidebar, it comes up as connected as: the persons name, not as guest like it should, this is confusing becuase there is nothing in the keychain at all