So as part of the upcoming Ghost mode available for sups.. there will be an accompanying packet that goes out to a client that's forced into that mode.. you'll get a #MU packet from the server, with your callsign and either a 1 or 0, specifying if you should mute that user from being able to send audio over built in AFV or not.
#MUSERVER:BADPILOT:1
you should enable mute, or not allow the pilot to talk
#MUSERVER:BADPILOT:0
disable mute, and let the pilot talk
this will be available for testing on d & e later, but it should be straightforward
Mike Evans in VATSIM dev discord: