A group is not a democracy. Members who disagree with decisions made by the owner are free to unsubscribe and form their own group. In practice, several problems arise from this approach. First, some members will typically side with the original owner. Some of these may not have taken part in the dispute. Second, people tend not to unsubscribe because they want to know whether people on the original groups are criticising them. Third, people from the original group will typically subscribe to the new group for the same reason. In any event, my understanding is that Yahoo will not intervene unless disputing members are violating the Terms of Service. And that is how it should be.
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