[toss1]

Considering the other mentions of a legit use case for continuing the group, and the problem of a random "new owner" swooping in and sniping the group/list for their purposes, I wonder if the solution is to intentionally corrupt the list [0]?

At least that would prevent the sniping. In your case, do you have any continued access or has control already been sniped?

[0] Delete all but a few members, replace all members's email addresses with junk/temp email addresses, etc.

[prune998]

In our case, our Org was the organizer, and we had a bunch of co-organizers. The only way to step-up as Organizer is to pay. None of us wanted that, and we were expecting the group to be destroyed after some time. I wan't also expecting meetup to "sell" the group to "anyone", maybe not being a member of the group, and not being a co-organizer.

Co-organizers can do almost anything BUT delete users or close the group.

Did our Org let us down on that ? sure. Was it cleat that anyone could take-over the group ? clearly not. What can we do ? Well, none of the comments helped on that... Meetup.com support neither...