We need penalties for those owners who allow their dogs to attack and kill other dogs, cats, and other animals. We need better controls on dog breeding, advertising and sales. Only when we insist on better behaviour from the person on the other end of the lead will we be able to address the dangerous owner problem.
There are strong rules and regulations on weapons, and gun licencing laws in place, yet anyone, anywhere can go out and buy a puppy from a pet shop or breed from their dog, which could potentially grow to be a lethal weapon. These dogs are on our streets and, despite looking cute, can be as dangerous as a firearm.
In my opinion, the coffee cup owners aren't respecting others in the park. They just don't see what they are doing as wrong yet if a youth's dog ran up and jumped up at them trying to snatch a treat it would be totally abhorent. Yet when Phyllis the 5yr old Border Terrier does it, its either not noticed or just midly amusing.