He wouldn't, I don't let him off his leash, the only place he defecates is in our back garden, I have the grass fenced off so he has a plcae to walk and shit. If he does happen to do it outside I carry bags with me and I clean it up. Also in this country it is illegal to let a dog roam free, but I agree with your sentiment. Me personally I would shoot the owner of the dog!!!!!