This article explains that group owners have total control over their group and provides information on how to contact them.

Group owners have total control over their group -- Yahoo! does not operate or maintain any of the groups on Yahoo! Groups. Rather, we give group owners the tools to create and run their own communities as they choose, governed by the Yahoo! Groups requirements within the Yahoo! Terms of Service. If you have concerns regarding the way a group is being managed, you can contact the group owner to express your concern or feedback.

To contact the group owner, send an email to: GROUPNAME-owner@yahoogroups.com. Note: Replace "GROUPNAME" with the exact name of the group.

If you continue to be unhappy with a group, you can leave it and try to find another group on the same topic or create your own.

Note: If there are content issues that conflict with the Yahoo! Terms of Service, please let us know by selecting Get Help on the bottom-right of any Yahoo! Groups Help page and submitting a report under the "Abuse and Spam" category.