The foremost duty of the State is to maintain law and order, and to ensure that life and liberty are held inviolable except in the cases where law demands otherwise. If the State fails to provide sense of security to the citizens, the most crucial justification for the very existence of State is lost. Therefore, it is of paramount importance that everything possible is done to keep unruly elements in check irrespective of whether these are roadside hooligans or part of an organized terror network.
Since crime prevention is serious business and the powers and authority granted for the purpose can be misused, it is very important that the provisions made against misuse are efficient and trustworthy with as little room for failure as possible.
Allowing private parties to gather intelligence or to actively participate in crime prevention can be useful, but must be done with caution. Our zeal to fight crime in general and terrorism in particular must not in any manner compromise civil liberties. That is the challenging part.