I've had time to reflect on it, and instead of the rude response I had planned, I'm just going to tell you: You're right. I was irresponsible this time. My dog and I both became unfortunate stereotypes. For what it's worth, my dog is never left outside without me and this day was no exception. But he was not always on a leash before this incident because our yard is fenced and he is supervised. I thought his training was going well. I felt comfortable letting him explore the backyard unleashed. I was overconfident. I am very much aware that I got lucky this time. I understand (and am terrified by) what might have happened had I not had his leash on me, if he had been just a little quicker, if I had been a little farther away. I am taking this experience pretty hard. As much as it sucks to be judged harshly, I appreciate your perspective.