You were aware. Should I have assumed everyone else is too? I agree that this justification is weak, especially considering evidence that these dogs also respon

You were aware. Should I have assumed everyone else is too? I agree that this justification is weak, especially considering evidence that these dogs also respond to handlers' cues, but some folks are likely to be ignorant of the current law of the land. It was a statement of fact, not an argument in support of the law's interpretation.