Here's how I'm looking at it: if I don't encrypt the entire session, then switching from an encrypted gmail connection to an unencrypted google maps connection might leave any cookies open to hijacking. I don't want to take the risk that someone can determine personally identifiable information--no matter how seemingly innocuous--while I'm browsing. It appears that most users, even perhaps users of these forums, view information privacy as a secondary concern. For me, information privacy is primary.