Before you join, the app has to approve you as a member (a slightly daunting process) or you have to be invited.
If you want to unlock certain features you either have to pay or invite other to join.
They just put you in there and expect you'll learn your lesson.
If they don't monitor your private conversations this app would be amazing.
For now until they change this flaw it's only getting 2 stars So far this app has been very fun for me and I have yet to have any issues.