The radar detector rule is enforced with a system called VG2. There are expensive detectors that can mask themselves to a degree...I've seen many friends use them all day every day. If you get pulled with one visible though, expect a nasty fine.

I don't think anyone has ever been clocked by aircraft, though I'm interested to here if someone has.

On I-95, the Smokies usually like to hide in the breaks between the trees, so it is good practice to slow down when you know one is coming...and they typically use the same places.

Welcome to VA...where you coming from?