Ours are around older kids a lot. One day I was walking the devil in tri's cloths and some little kid comes running up asking to pet the dog. I told him not to, it is not a good idea, but he keeps coming. He runs up to the dog (it's winter) the dog jumps up at him grabs his hand/mitten starts-growling and going half savage at the poor kid. He would not let go right away. Finally I pulled him off the kid and the kid gave me the most shocked look like "what's wrong with your dog?" and just walks away. The dog seamed more to be bullying or challenging the kid, not going into complete attack mode. He sure was not playing around and the kid knew it.
I was lucky he did not do any serious biting, but it was close to coming to that. I learned my lesson NEVER TO WALK THE DOGS CLOSE TO SCHOOL TIME, when all the kids walk home.
I had another time when some kid's walking a wild young lab with a inner spiked collar and stops some distance away from us and asks if our dogs can meet, I say No, sometimes he's not friendly, but again the kid does not listen and says my dog wont hurt him and he & the dog runs up to my dog all wild, my dog just let loose on the lab and bites him on the ear, the dog screams and the kid gives me the same look. I yelled at the kid and he & the dog ran home. Luckily, I or the dog did not get in trouble.
you run the guantlet when you walk a biter.