Hi Zap,
I think the members2 group is for the http://denseplasmafocus.org/ domain which should probably be destroyed as no-one is taking care of it.
Its ok if the leak is small as we have means for automatic cleanup.
I have a pre-purge backup (somewhere in dropbox).
Until now only one person has complained of loosing their account and he did not have it activated as it was an issue with a system back then,
so I think the purge is successful, but we can re-invite the users if we find a bulk mailing system to use.

Joe, please dont be cheeky, this is serious business 🙂