You make an excellent theoretical argument, but how else can you explain how google added dozens of names of stone age amazon Indians to my account? The facts are these; I did not add them, google did. They have no form of digital contact (i.e. email, facebook, twitter etc.) so there is no possible way for me to have sent them a digital comunication from which google could have extracted their names. Now, you can make all the theories about how I am not important enough to google for them to care, or how the data load google handles a daily basis is too massive for them to scan everything, but you have to included the facts of what I am saying into your theories.