I notice a person posting in rec.photo.digital.slr-systems named
"Brion K. Lienhart" kindly informed users that he was able to block
much of the spam from china or canada flooding the newsgroup.

It seems to be working for me. When I get a pesky spam I clicked onto
Message/Create Rule From Messages. Choose to delete and change the
senders name to:
sina.com .com.cn .watch.com jewelry yahoo.cn wholesaler cnreplicas.com
watches replicas wholesale