These people know exactly what they are doing. Cloaking their statements in deniability to protect themselves, they are baiting and hoping that some crazy will come out and do exactly what they are always suggesting. In this case, using the negative is just a thinly veiled cover, also known as a dog whistle to the leftist crazies.
Problem A) You can't ask her to restate her question with factual numbers without mayhem and insanity going off the scale.
Problem B) If you answer the question, you just verified the hundreds of recent school shootings which never happened,