Dude in said uniform.
Since the military is covered by special laws under the UCMJ, I think we should have an additional special law for those pretending to be covered by it: Automatic enlistment as an E-0 (A new rank for prisoners) for 5 years hard-labor penalty for attempting to defraud the public by making them think they are covered by special laws.
Let’s not forget, the UCMJ conveys special handling under civil and criminal law for military personnel. Attempting to defraud the public into thinking your are covered by those special laws means you should be held accountable for them.