When Geolocation Gets Too Clever
http://www.mediajunk.com/public/archives/2007/08/when_geolocation_gets_too_clev.html

Heraghty, Michael
Mediajunk
2007

Abstract:

Geo-redirecting -- redirecting users to different parts of your website depending on their own geographical location -- is a neat trick. It is handy when your website has different messages or product offers for users from different countries or regions. But many website owners mistakenly assume that their geolocation software works every time. It doesn't!