I despise speed camera's. There purely there to generate revenue for the piggy wiggies! Annoying as it is a lot are just in foolish places. There's that many of them now though that any time i see a long stretch of road i'm always uncomfortable with cranking it up a notch as i always assume there'll be a camera hiding somewhere.
If you're ever unsure about whether or nto speed camera's are a good idea, simply watch Top Gear as there was an episode when Clarkson discussed them and listed off the facts that there had actually been more deaths WITH the speed camera's, than before they were put up. Madness and a complete waste of time!
