This is way beyond anything necessary, legal or moral, hence the outrage!!! Even if NSA/CIA/FBI did it - it would still be illegal, unless explicitly allowed by the judiciary, for serious reasons only!!! So your ignorance in terms of even the very basic, minimal democratic culture and civic spirit is - simply put - astonishing!!!
Well we may just expect what FB staff (not accusing, just assuming) could do with the data of a specific user. Collecting for advertising analytics or geo-location based friend offers of those even using the same WiFi somewhere for a while is a child game. This is just a hint of an iceberg from mr.Suckerberg
This: http://surveillancewithoutborders.com/#/?cn=ZmxleGlibGVfcmVjcw==&refsrc=email http://surveillancewithoutborders.com/#/contribute?cn=ZmxleGlibGVfcmVjcw==&refsrc=email
...instead they attack their critics... The last one is their orchestrated attack on Soros... That should tell you enough of their "liberal" and "progressive" nature...