Like many webmasters I was a bit too relaxed about 302 hijacks, until I started digging into who was hijacking my pages and how could I remove them. I have now discovered that this problem is numerically out of control, with millions of 302s out there. And boy, am I angry. If you have a Dmoz link, check for 302s - obviously Google have to have indexed the page thats 302ing you, for it to be a problem. Maybe its my fault for having lots of Dmoz links!
Surely not millions you say, but there are a number of scraper directories taking the DMOZ feed of 4 million sites and 302ing the lot. I have explored the depths of two such sites found here in my blog . I have no idea how many of these Dmoz fed, 302 scraper directories there are in the wild, but there has to be more than the two I detail. At 4 million 302s each, that is one hell of a lot of 302s
I have now removed 40 of these 302s from sites that were pointing to my sites, and according to Google’s own fact & fiction page
There is almost nothing a competitor can do to harm your ranking or have your site removed from our index
If I may say so, this is Utter Bollocks. Their advice to me is unlikely to get me anywhere, so I have acted myself and removed the pages 302ing me. Real 302s or I would not have been able to remove the pages pointing to my sites.
we suggest that you directly address the webmaster of the page in question
Thanks for that advice guys. Bit like asking a mugger if he would mind awfully stopping robbing you.
And if you are unsure what a 302 page hijack is, then perhaps the best explanation of 302 page hijacking is given by Claus Schmitt
An explanation of the page hijack exploit using 302 server redirects. This exploit allows any webmaster to have his own "virtual pages" rank for terms that pages belonging to another webmaster used to rank for. Successfully employed, this technique will allow the offending webmaster ("the hijacker") to displace the pages of the "target" in the Search Engine Results Pages ("SERPS"), and hence (a) cause search engine traffic to the target website to vanish, and/or (b) further redirect traffic to any other page of choice.