One at the dog park the other day. This is a designated off leash area and generally all the dogs play really well together. My dog loves it. Except for one poor dog with a SS owner who can't be bothered to train or supervise it properly. The dog was still at that full-grown-but-puppy stage where it likes to 'rough play'. Although this is a normal stage MOST puppies grow out of it when older dogs teach them that they Don't Like It. I had already called my dog away from this other dog once because the other dog just wouldn't get out of his face and the owner was nowhere to be seen. I also saw several other dogs get annoyed with this dog.
Anyway, we had then moved right over to the other side of the park to avoid problems when who should come bounding up but this dog, again. He then proceeded to do that "I'm going to growl push you to the ground and bite your neck" play thing that some younger dogs like. My dog responded with a firm "Get off me!" that I could tell might move to a nip if this dog didn't back off. Not wanting to deal with that hassle I called my dog to me and held his collar and tried to put my body between him and the other dog. Which would just not go away. His SS owner looked up from his conversation, saw what was happening and then just kept chatting. I actually assumed that his owner was nowhere around because the people I could see were not reacting so I thought they mustn't have anything to do with this dog.
After a good full minute though, he finally deigned to stroll over and do something about his dog, and then said quite snootily "He's only playing you know" like I was just an hysterical woman who was panicking over nothing. I replied in as icy a voice as I could muster under the circumstances "Yes, but my dog is older and doesn't like it. Older dogs don't." Honestly, the guy was too stupid to realise that I was actually trying to *protect* his dog. I'm betting he'll be the first to complain when another dog bites his, which is what is going to happen if he doesn't control it a bit better.