On the other hand, a short page explaining such things and processes can’t hurt.
Apart from the deregistration process, it would be nice if there was an “abandonement process” (no longer want to maintain) and some explanation of responsibilities (Hypothetical example: DON’T ship backdoors. DON’T just vanish from the face of the earth; INSTEAD trigger abandonment process. DON’T give up control of your package to friendly strangers from github when you don’t want to continue maintaining it; INSTEAD trigger abandonment process.).