Invite who you want in group calendars

Oz Oscroft  Points 1-3 are all correct. That being said, for (3), when you "stop following", the default is that you'd still get meeting invitations, just not conversations. You'd really have to try hard to turn off meeting invitations as well.

On 4, whoever received an invitation/in their calendar will still have the invitation, even if they leave the group. There shouldn't be any changes with this update in this regard.

Gilles Couzin: Hmm--this shouldn't be happening. Let me follow up with our engineers.