I met a bloke down our local park - hadn't seen him much. He had an enormous GSD - very nice friendly dog but the owner said "he didn't know much about dogs" so I let Frosty say hello to his dog - but I pretty much avoided them after that. It was clear from what he was doing with his dog - that he was right about not knowing much and I could not see it ending well. Ie the dog was being "punished" with the check chain for being friendly. A lot.