Sadly it seems this waitress was trying to wrongfully draw attention, and sympathy cash for herself with false claims. One good thing about human nature, particularly being a scum-bag, doesn't discriminate on race, sex, or sexual orientation.
The article could be wrong but if the people can provide a copy of their credit card statement showing the full charge on their account, then that is pretty hard to dispute. If true, I think the waitress should be brought up on charges of theft by deception. Just my $.02