One of the biggest weaknesses of MSN search is that too easy to be spammed. Yeah I confess that even I have have done it and no you will not be able to find out what I had done.

Back to topic — while reading Aaron’s SEO Book Blog, I came across this post : MSN Search Spam Research where he quoted MSN Search team –

Our approach is to treat each spam page as a dynamic program rather than a static page, and utilize a “monkey program� [6] to analyze the traffic resulting from visiting each page with an actual browser so that the program can be executed in full fidelity.

Many successful, large-scale spammers have created a huge number of doorway pages that either redirect to or fetch ads from a single domain that is responsible for serving all target pages. By identifying those domains that serve target pages for a large number of doorway pages, we can catch major spammers’ domains together with all their doorway pages and doorway domains.

Interesting. But would it be effective? I doubt to. Heck, even being a non-geek that I am, I can think of ways around it. I bet spammers are smarter than me at deception.

And just in case you have always wondered why Google keeps mum about their backend — this is one reason.