Websites should use the X-Forwarded-For header to determine the IP address of the client for the purpose of IP geolocation. I don't think they're suggesting yo

Websites should use the X-Forwarded-For header to determine the IP address of the client for the purpose of IP geolocation. I don't think they're suggesting you just assume that the IP is correct, only that if you are doing some kind of regional customisation that you can use that X-Forwarded-For header to help.