Page Hijack Exploit: 302, redirects and Google

Page Hijack Exploit: 302, redirects and Google: "racked this and related problems with the search engines literally for years. If there was something that you could easily do to fix it as a webmaster, I would have published it a long time ago. That said; the points listed below will most likely make your pages harder to hijack. I will and can not promise immunity, though, and I specifically don't want to spread false hopes by promising that these will help you once a hijack has already taken place. On the other hand, once hijacked you will lose nothing by trying them.
Always redirect your 'non-www' domain (example.com) to the www version (www.example.com) - or the other way round (I personally prefer non-www domains, but that's just because it appeals to my personal sense of convenience). The direction is not important. It is important that you do it with a 301 redirect and not a 302, as the 302 is the one leading to duplicate pages. If you use the Apache web server, the way to do this is to insert the following in your root '.htaccess' file:"