Hi,
Reminds me of the situation described by a friend of mine who works on container ships. They had a scheme whereby they were giving away corner-cube radar reflectors at the Chinese ports serving very small, local fishing vessels in the desperate hope that they'd start using them. Running into small coastal fishing vessels (even sampans) at night was becoming habit-forming, and of course the container ship crews often didn't have the slightest idea it'd happened.
I presume there's some suitably modified analog of this for aircraft.
Phil