Will the demolition of double click boundaries intrude on personal territory?

Google’s announcement (well, more of a mumbled statement) that the wall between DoubleClick and other data sources has been demolished, has caused debate among the tech-savvy public.
Yet, digital marketers are looking at it in a different light because this change increases the amount and variety of data that can be used to target individuals. There now exists the possibility that users could be targeted with ads individually attuned to their personal information, fully tracked as a single