What did they do before G-INFO if they needed this information at 3am in a SAR situation? Do you honestly belive the police will be looking up G-INFO on the internet to get this information? I don't think so!
I know these details have been available in books long before G-INFO came along, but it just seem too easy to access this personal information. After all you have to register to get a person's details from their vehicle registrations, why should it be any different for an aircraft?