I was getting 10 spams for every “legitmate” comment recently so I did some digging and found a domain from which most of the spam was coming. A little firewalling took the lot of them out.
DROP all — 0.0.159.27.board.xm.fj.dynamic.163data.com.cn/16 anywhere
DROP all — 0.0.204.121.board.fz.fj.dynamic.163data.com.cn/14 anywhere
Now the spam bin is not filling up. I can page through it quickly to get the odd verbose/linky comment to retrieve. Too bad about the rest of the Chinese, however.