You have reasons to be paranoid on what all Google does with your email.
I was having an email conversation with a contact to schedule a meeting. I used Gmail. As the email thread grew, on the right side navigation Gmail shows links to add this to the calendar. When I clicked on the link, Google had pre-filled some of the fields like date, location. If I had used a different time format, Google would have picked that one too.
It is nice to know that Google does so much for better user experience. At the same time, I am a bit uneasy with the parsing of my mail content. I guess Google WILL parse the email for ad-sense and such money making features.
Is there a way I can tell Google not to parse my mails or show context sensitive ads on the right side?