The state has to ensure taht the individual rights to privacy is not breached, but at the same time it must also make sure that unsscrupulous individuals do not misuse privacy to pursue illegal or immoral ends. And this is easier said than done.
With the technological advances made the dangers of transgressions have increased manifold on the side of both the individuals as well as those who act on behalf of the State. Armed with modern surveillance devices, both State and non-state actors seek to pry out personal information for different purposes. And not all of these purposes and methods are legitimate. From corporate spying to pre-marital investigations, there are a whole lot of activities that private agencies indulge in. MOst of these investigations might not be illegal per se, but the danger of overstepping the boundaries is always there.
State, on the other hand, has far greater resources to quietly peep into the private lives of the citizens, which is why it is important that effective safegaurds are in place to ensure that intrusive surveillance is resored to only when absolutely necessary. The law must, therefore, suitable amended so as to be in step with the huge technological strides made in the recend times.