Major Internet Service Providers (ISPs) often make it possible for people to open discussion groups on most any topic, supported by advertisers on the web pages of the discussion archives.
When there is no moderator, these groups also attract a lot of spam. Some groups are listed as being moderated, but the groups can continue after the moderator has left the group. After a while, all the real people have left, and all that remains is the spam. But the list is still coded as moderated.
System Topics in India https://groups.google.com/forum/?hl=en#!forum/LathaHR_System_Network_Admin (private)
RPG in China https://groups.google.com/forum/?hl=en#!forum/RPGLE (private)
comp.sys.ibm.as400.misc public usenet https://groups.google.com/forum/?hl=en#!forum/comp.sys.ibm.as400.misc
Here are some of the groups, not an exhaustive directory.
DB2 http://groups.yahoo.com/group/db2-1/ (little or no recent activity)
RPG/400 http://groups.yahoo.com/group/rpg400-1/ (little or no recent activity)
AS/400 Support http://groups.yahoo.com/group/as400support/ (little or no recent activity)