Moderators/editors cannot remove themselves as moderators/editors
There have been two tickets requesting this in the past few weeks, so I thought I would file it here, but it isn't high priority.
A moderator/editor does not have access to edit the 'edit list config' -> 'list definition' screen, and thus cannot remove themselves as a moderator/editor.
I've been confirming that the person is at the email address to be removed, and removing them if they say it will be a pain to have the list admin do it, which I think is fine, but ideally they could remove themselves (without changing any other list settings.)
(from redmine: created on 2011-10-04)