Part of me wants these cameras, as I cannot stand fools who blow through red lights and severely speed on public roadways. If properly executed, with no profit incentive, and reasonable & clear definitions for what constitutes a “violation”, they probably have great potential for decreasing dangerous behavior. The difference between the potential and the execution is what scares me, though, for reasons described by others.
Politicians are incompetent and corporations are greedy. Combine the two, and watch out.