It would be cool if the developers set up a restricted airspace around some airports that have it real life. This is how it would work:
-Air Force/military aircraft would be all word in
-GA/commercial aircraft would get a warning
-Warning would say; "Attention [callsign], you are in [a] restricted airspace! Turn back immediately!
-failure to turn around within 5 minutes would result in a violation
-if the player still does not change course, the grade will drop to the next lower grade
-if the player STILL does not leave the airspace, they would be kicked from the server
The developers would be able to remove/add a restricted area at any time. They can set the altitude of it, too.
NOTICE: I will re-word this soon. I typed this on my phone.