With the group system Groups are able to make Private worlds public with the
Groups Public
feature... This kind of makes it hard to keep private worlds private.
I have seen a group called (ERP Enabled)
actively making adult and mature private link only worlds Public and Group+
This kind of ruins the whole point of making a private world. Sure, they are not searchable but still it's better if Groups can only set private worlds to Group only, at most Group+.