I am a professional dog trainer, but spend many hours with my own dogs doing tricks at various parks. I was at a park close to my house working on tricks with my border collie. I was busy working with him and this kid yells out at me, "Can I pet your dog"? I responded, "No, not today. I am training him." The kid got really mad at me and yelled, "I HATE YOU!". I said, "I'm sorry you hate me, but you still CAN'T pet my dog!".