Google Groups for CR-48 Pilot Users

I was roused from sleep by my Nexus melting by the 800 emails all hitting it at once. No opt-in, fortunately it was downstairs on the coffee table.

I filtered it all to a label. 30K users in the group getting sending messages all at once. What fresh 200-300 emails at once at 3:30am EST. What fresh hell is this? Did an engineer make the entire list global by mistake?

The group is setup to allow users to respond to all... and there are about 30000 users on the mailing list. It's fun for a bit, but I'm guessing it was meant to be an announcement only list. Any googlers up?