"(aka, who the fuck complains about a broken speed camera?)."
If the installation of the camera reduced overall speeds on that stretch of road, then pretty much anyone who lives nearby might do so (unless they've been caught by said camera!).
However, funding for replacement of broken speed cameras appears to be quite difficult to obtain, so it can be years before repairs are made. The latest trend (in the south-east, at least) is to introduce stretches of "average speed" camera checks to replace the older Gatso (and similar) fixed location cameras, usually covering considerably more road network than the original camera deployment (and extending ANPR surveillance at the same time!).