And that is exactly how the Europeans feel when their health records are handled by Google and the TSA wants to know their Facebook handle: what initially appeared as a nice-to-have is now all over a sudden a government source of data no one anticipated...
Edit - oh darn, I forgot Ancestry.com and 23andMe, which are even worse examples: US police has full access to all DNA samples provided by anyone in the past. That is 20 million DNA samples. Not name or age - full genetic info...