I would recommend that any/all members use their report tools in order to make sure that the ninja are made aware of these. The more they are reported, the more we get to kill. Group admins should be able to ban the offending "members" from their group as well. But the report tools work within groups too. If the posts are reported sufficiently, we can get to them. Right now, we're on S&D patrols looking for them, but if a group is not making public posts, we can't see them and will need the assistance of your valid group members in order to see the offending content/account and respond accordingly.