Good point. As it appears the citation is strictly a result of the BAC of the cab passengers, the state agency is assuming all the alcohol consumed was from the bar. Also, the bartender/waitress may have performed a good deed by making sure they didn't drive and took a cab instead. At look at the result -- they are the one's cited. What irony. What lunacy!
Place that logic on the bar and back away slowly, keep your brain where I can see it.
With the object being to shut down every independently-operated bar and restaurant in the nation.