I suspect that this may be an example if you're willing to consider the moderator of comp.dcom.telecom as the "Group" trying to shout down a proposal. On the other hand, since the purpose of the group was to end his moderatorhood, it isn't clearcut.
Source: wiktionary
You cannot exclude an entire nation's citizens from moderatorhood, particularly the U.S. with its contributions to crypto, just because you might want, on rare occasion, to post code in a forum.
Source: wiktionary
(In case anyone wonders "what happens if Mr Mike becomes a despotic dictator, using his moderatorhood as a power base to douse the flames of freedom everywhere?" The answer is, someone posts an RFD suggesting a change of moderator, then we vote on it.)
Source: wiktionary