This Motley Fool article reflects my basic sentiments on Gmail. Again, I realize I may be reacting on an emotional level more than a logical level, but retained data is retained data. It has both commercial value and value to snooping feds.
That is why I have respect and admiration for the stance taken by Anne Turner of the Santa Cruz public library system. (See also.) Ms. Turner not only posts signs warning patrons that their borrowing history could be monitored, she has also instituted a practice of shredding daily internet sign-up sheets. She is one rockin' librarian!