I have sent messages to firstname.lastname@example.org repeatedly asking to be removed. It auto-replies each time insisting that I'm not a member if the group and I keep recieving the emails. Today, I went so far as to join the group and set it up to not send me emails. Of course, that didn't work either.
As far as I can determine, there's no administrator address for this group. How do you unsubscribe when Google's autobot has gone stupid?