<https://www.propublica.org/article/google-has-quietly-dropped-ban-on-persona...> When Google bought the advertising network DoubleClick in 2007, Google founder Sergey Brin said that privacy would be the company’s “number one priority when we contemplate new kinds of advertising products.” And, for nearly a decade, Google did in fact keep DoubleClick’s massive database of web-browsing records separate by default from the names and other personally identifiable information Google has collected from Gmail and its other login accounts. But this summer, Google quietly erased that last privacy line in the sand – literally crossing out the lines <https://www.google.com/policies/privacy/archive/20160325-20160628/> in its privacy policy that promised to keep the two pots of data separate by default. In its place, Google substituted new language that says browsing habits “may be” combined with what the company learns from the use Gmail and other tools. The change is enabled by default for new Google accounts. Existing users were prompted to opt-in to the change this summer. The practical result of the change is that the DoubleClick ads that follow people around on the web may now be customized to them based on your name and other information Google knows about you. It also means that Google could now, if it wished to, build a complete portrait of a user by name, based on everything they write in email, every website they visit and the searches they conduct. [...]