When I discuss with friends about privacy concerns, very often they retort me the famous 'I've nothing to hide so nothing to fear'. There's a well formulated answer in the article:
and, if the word dignity do not seem to light up something in the eye of your interlocutor, a more concrete argument:
source: http://www.sott.net/articles/show/182879-Give-us-back-our-private-lives
The problem is that everybody has something to hide: some degree of privacy is necessary for human dignity.
and, if the word dignity do not seem to light up something in the eye of your interlocutor, a more concrete argument:
In the 18 months since computer disks containing the records of all 25 million families receiving child benefit were lost by officials, at least a dozen other departments have admitted to losing vital personal data on millions of people. Should the data fall into the hands of criminals, the potential for damage is immense.
source: http://www.sott.net/articles/show/182879-Give-us-back-our-private-lives