Privacy hasn't really been a major concern until the information age, when the advance of computers allowed for massive amounts of data on individuals to be collected, shared and stored by the government and others. With the benefit of hindsight, the founding fathers might have included a provision regarding privacy.

Doesn't Amendment 9 in the Bill of Rights indicate that it is possible for other rights to exist without being stated in the constitution. Perhaps privacy is one of these rights.

I don't know how far state constitutions go regarding privacy, but I am guessing almost all government departments have some kind of protections in place for peoples personal information.

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"Conservatives are not necessarily stupid, but most stupid people are conservatives." — John Stuart Mill