Teaching your dog to be polite round dogs and people is vital. You may see off lead dogs out of control. They may be friendly but they are annoying if no recall or run and jump up or knock into you. Dogs should be off if they are able to interact correctly with people and dogs. No jumping, no running off to everything. I recently was with a client and a very friendly but randy dog came and was annoying our recall session. I got hold of the dog but it was 7 mins before the owner appeared. Training is the key, we like them to play with permission, we like them to be stroked and admired with permission. We like off lead but without the risk of loss, stealing or causing harm. please train your dog.