Tell-all telephone – Six months of phone metadata visualized
If some agency like NSA etc wants to know about you in great detail, clearly they have the data, and will be able to very quickly put it all together.The other side of this coin is that commercial parties like Facebook etc have the same potential detail and insight about anyone.There is also very high probability that similar data is being put together by entities somewhere between the NSA and Facebook, for purposes that are much more starkly not in your best interests eg fraud.Bottom line: anyone is an open book on the internet.