I may just be paranoid but the following sequence of events happened to me recently.
I was looking at this forum and saw a face photo of a provider that I found "cute".
I saved the image and emailed it to a friend telling him that that was the type of woman I was really attracted to. I used a gmail account.
No other action was done regarding this provider.
I log in into a facebook account I have. I have no personal info on this account I use it just use it to see other peoples facebook if they point me to their page.
When I log in into facebook suggests me that I might know this person, I hit the link and there is the facebook page of the cute provider I downloaded her photo a few hours earlier. Therefore involuntarily I find out her real name an a lot of personal info.
Really scary. I bet you that Google scans the photos and probably uses face recognition software to try to find where to point you in their affiliated social networking sites.
This together with the fact that they are funded by NSA and LE and share information with them is enough to give me the willys.
P.S. This site (ECCIE) is also sharing info with Google. When you load it there is a website (ajax.googleapis.com) that is doing something while you browse ECCIE (reported by my antivirus software). I wonder who is Google sharing our private messages and hobby preferences with.