I would like to assign an avatar to every user on registration, and then prevent the user from changing it (so that there is no confusion on user identity). I am using the following set up:
ON Disable users uploading pictures to profile
OFF Force users to select an avatar image when editing their account
ON Force users to select an avatar image on user registration.
ON Enable random default avatar image.
However, when entering the profile edit form, users are still allowed to select/modify their avatar. If this is the intended behaviour, is there a way of achieving the described requirement without installing additional modules?