The bin-cameras have been around here in the Netherlands for a few years.
Someone even got arrested over moving one once, because it was too close to the road and causing a hazard...go figure.
Another sneaky one is small trailer by the side of the road with a tarp over it.
I don't mind speed cameras near dangerous areas like school routes, but those along the freeway are just plain cash-generators.
The regular fixed speed cameras don't tend to live long when they're turned on. In my area the 4 that were place along a 100kmph road were all run-over, burnt or spray-painted within a week. The police can't replace them because the insurance company no longer covers them.