I recently watched a submarine movie called Grey Lady Down. In one part, radar is disrupted by canyon walls, making everything a blur. Sonar similarly returns much information that must be filtered out and many false positives.
Could this sort of scenario be made fun with FPS radar?
What if some parts of a map were radar dead zones? What if certain objects on some maps appear as false positives on radar, requiring familiarity for players to know the static dots aren't poachers?