Good to read this today on Typepad Resources
TypePad vs. Comment Spammers
Recently we added some simple tests that eliminate a large amount of comment spam on TypePad blogs. According to our logs, most spammers try to cover their tracks by sending their posts through an “Open Proxy Server” … we started blocking Open Proxies — all 1.5 million of them. It immediately reduced the comment spam problem. In fact on our first day it blocked over 20,000 spam attempts!