It does seem laughable. He admitted he had not familiarised himself with flying procedures in the UK, he was unaware of the airfield closure NOTAM and ignored instructions not to depart until the airfield was operational. Forgive my ignorance but I do find it worrying that there was no power allowing service personnel to prevent an intruder flying off from a military aerodrome. May be there should be a Speed Awareness style compulsory multiday Aviation Law course for such offenders.
I am also reminded of the failed/abandoned experiment to link fines to income.