To inject a bit of a reality check.
If they terminate your employment, they switch off you ASIC card's access. If you were to then access an airside area without a legitimate reason you are breaking the law and are likely to be locked up, charged and a black mark put against your name when you next try to get an ASIC card.
I know it was different in the old days, management were a bit nicer because they came from the ranks. These days they're all uni grad career managers that thrive on conflict and have a deep seated hate of workers who get one over them.. They still have the ****s from 2 EBA's ago when D.Cox got the boot shortly afterwards. This is their punishment.