Up here in Virginia, we've been having big fights about the red light cameras: people claim they're an invasion of privacy, that they never gave permission for their picture to be taken, it's all just a money-making scam, and on and on.
Personally, I'm in favor of 'em: a camera setup is expensive, but cheaper on my tax dollars than hiring more officers; and for crying out loud, if you don't want it to take your picture, don't run the red light in the first place!