Just get a list of Hog pilots from the Allied CO (or you assign them) before launch. Then watch them take off from the CM eye. Anyone that isn't authorized to take off in a Hog, give them a warning to land/auger and get a Wildcat. If they refuse to comply, give them the boot.
Or... just let them fly and ridicule them publicly on the boards like was done for those taking drop tanks on the P-47s that one time.