I do weekly challenges with friends but if we have an empty spot people from my or their friends lists just join and then we can’t have our friends in. I wish we could not allow people to join without an invitation or we were able to kick people from groups
If this was done, it would have to be blocked after the person contributed some determined level to the task. Would be very open to abuse if not. Would also have to give the kicked person back their “ticket” to the event. I guess a better alternative would be “Privite/invite only” groups.