yes they flash if you go straight from a turning lane in the direction the camera is targeted, although im not sure if you can get out of it or not.
to be done for running a red light the light must be red before you cross the solid white line heading into the intersection, if your half way through when they go red your fine.
also the limit they set them to seams to be 7km/h over, anything less and you wont get done.
sort of related, with the new poliscan mobile cameras they only take 1km/h off the recorded speed for your alledged speed now, as compared to 2km/h for multinovas.