Personally I'm baffled how a MOVING AIR extractor is not a "movable aerodynamic device" in the first place.
I do not consider it a movable areo device. The FIA classified it as legal last year. That said I do find it strange that a mass damper is considered a movable aero device and therefore banned, and a brake cooling system, that clearly moves with relation to the sprung chassis and improves airflow around the wheels isn't considered one. So bash away, while knowing I was right all along