Hoople - 2:30 am on Jan 20, 2011 (gmt 0)
In my niche there was one group that had a large portion of their reason for being 'taken away' by a 3rd party. The equivalent of the 'coup' in the group was the operation sub-group that worked with what was taken away.
The operation sub-group formed a new group. Then the original group on hearing about the new group asked them to merge, after they realized they lost most of their members. A vote was held and the new group remained separate.
Several gray haired members of the original group that were unhappy with the vote's outcome (and the new group's organizers) 16 years later are still doing public and behind the scenes backbiting - proving not all children wear diapers!
The original group had done meta description header and white text spam on hundreds of pages on their own website in in the recent past as an attempt to divert traffic back to the original organization. I recently got them to remove that spam with the treat of a DMCA notice just before their busy season (web advance ticket sales).
I personally would help the coup group anonymously by emailing the list of emails to the coup group from a new fee email account and deny involvement to ANYONE that asks. Smile when the t**d of the original group floats downriver and out into the ocean to hopefully never be heard from again!