Were you guys there? Did you actually hear the cop say that?
Don't have to worry about it since we don't have that here. Like has been mentioned before, each state has their own rules.
Again, it goes back to my first statement in this post. Time and again, someone will have some sort of enforcement action taken on them. The cop won't say much of anything and by the time the person gets back to the party, the encounter with the cop is totally blown out of proportion and people are telling the poor schuck to get a lawyer and sue everyone and their second cousin for excessive force.