It is neither stolen valor (you cannot steal valor) or free speech (unless you are conservative or Christian,you can say about anything you want), it’s FRAUD . . . obtaining something you want under false pretenses, even if it is only someone’s respect and admiration.
If someone snookers your mere friendship under a pretense, when found out that person ought to be called to account, whether shamed and shunned, or whether explicitly forgiven (but in no case excused).
If someone snookers a material favor, you might have a civil case. If there isn’t a law backing this up, there perhaps should be one. It’s no better to snooker drinks at a bar because you masqueraded as a general than if you snookered a handicap parking spot when you weren’t handicapped.