OpenID

OpenID is an excellent idea for casual site browsing. I am not adverse to a certain amount of activity monitoring. When presented with the option to allow Google to monitor my searches, without personal information of course, to help them improve search I checked the 'allow' (or equivalent) box as I believe it does helps improve search results, and I actually like the idea of targeted information, ads included. I enjoy the convenience of OpenID, but only because I know that I am free to log out at anytime.