Also confirming they are always activated for speeding;
I have been done personally about a year ago for 11ks over and the light was green in the photo I was sent.
They also catch you for turning right on a red when straight ahead is green, have seen the riverside drive camera snapping people for turning after its red
*edit* and to add, possibly can get you for going straight ahead in a right turn only lane - think I heard a mate telling me he got done for this, can anyone confirm that one?