Ummh... Kindly ask the person not to bother your dog, walk away, ignore it, theres many other things you can do. You can try and explain to person that you are in the middle of training your dog, and not to bother you. Also his/her parents weren't responsible enough to teach him/her to ask to...
Hey Im New Here, My name is Fedor, I own a 14 month old Pit Bull. I hope to find new thing one this site, and big help. I have been lurking around for quite a while and decided to join in.:)
Here is my dog at 4 months