As usual, it's a question of balance. In a country where people trust the government enough, or at least trust the system of checks and balances that must keep the government at bay, the idea of the benefits provided by proper use of the cameras outweighs the fear of the scope creep.

In a country where people expect the government to act unreasonably and to flout legal constraints, the fear of the scope creep and total surveillance outweighs the perceived benefits of legitimate use.

By answering this question, it's easy to determine how people feel about their country :-/