Yes, you read it right! Owing to a flaw in MSN's new anti-spam algorithm, you can remove your competitors site out of their index. Well, at least till MSN fixes the flaw.
BoogyBonBon.com tells you how to do this. The article provides a lengthy description on how to go about it. The summary of the method is that most sites return a 200 status if you add something to the URL and this is when Microsoft can be convinced that the site has duplicate pages. Microsoft will eventually penalize the site and de-list the site.
"Go to your competitors website, then up in your address bar add an extra little bit to the URL. Something like ?test=12334, or ?remove=bye-bye. It can be anything you want it to be as long as it’s a _GET URL that the search engines can read and is unique each time.
If all goes well, your competitor’s website will show the same page that you had seen before you had put in the extra info in the URL. Once that has happen grab the new URL and take it to your favorite header checker and see if the website returns a 200 OK status, if it does keep that URL for later.
If your competitors website does return a status 200 when you add a GET vars to the end of their domain name, all you have to do is keep changing the string that you posted to your competitors website and keep them in a text file for later. Once you have made a couple hundred new URL’s on your competitor’s website on the index or on every page of the domain you will then need to add all the new URL’s to a website where MSN will be able to find them and index them." Read the complete article here
The article is concluded by stating, "This type of hack is very bad for our industry and I hope MSN will take quick steps to fix this ASAP.."