Removing a user may leave segments owned by that user
When you create a new user, depending on which protocol is used to createit, it will be assigned a newly created Segment as its default segment,
and ownership of this segment is set to the new user.
If you remove a user from AllUsers, the segment/s owned by this user are
not modified, and continue to reference the removed user. This will prevent
this user and objects created by this user from being garbage collected.
Workaround:
The User Administration tools in GBS transfer ownership of Segments to
the user that is performing the operation.