I do think it depends where you are though, as the fact is, a dog who's out of sight is not under your control and could pose a danger to itself or others (deer, cyclists, etc etc). The owner is responsible and will carry the consequences. I'm not saying my dog has never been too far away, I think most honest owners would admit the same, however I don't think its good to just accept that "that's what dogs do", - it can be discouraged with training.