But one should assume the dog is NOT aggressive, and don't react with force or aggression unless the dog actually does something that can cause harm.
This is ridiculous.
While I am a pretty good judge of animal behavior, if a dog is running full speed at me that
shows a complete lack of control by it's owner, and I will act appropriately. That means I will protect myself and/or my kids without concern for the safety of the animal. I would have no promblem with using whatever force I deem necessary to control your animal if you cannot keep control of it yourself.
Oh, and as an aside from the leash discussion, I don't think it's "cute" that your dog is jumping up on me or sniffing my parts because he "just wants to get to know me."
If you can control your pet, great, there is no problem...unfortunately, far too many people can't or won't.
What if your well intentioned dog is running with no intent to harm, sees a child running away in fear, and has it's instincts take over? There is far too much of the "my dog wouldn't ever hurt anyone" type of denial.
ALL animals can revert to base instinct given the right conditions. As I had stated in a previous post, I have been nipped several times by "good dogs who don't bite." I have seen a little girl quietly petting a dog (for around 10 minutes) get bit in the face because the placid dog suddenly freaked out. And as posted previously here, I too have had many incidents with unleashed dogs while cycling (a couple times even on a motorcyle!).
I love animals...I just wish their owners would be more responsible (with apologies to those that are).
Keep em leashed in areas where there is a large public presence and let em roam where appropriate.
"Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive" -- C.S. Lewis
If the only way to combat "global warming" was to lower taxes, we would never hear of the issue again. - Anonymous
"Society in every state is a blessing, but Government, even in its best state, is but a necessary evil; in its worst state an intolerable one" — Thomas Paine, 𝘊𝘰𝘮𝘮𝘰𝘯 𝘚𝘦𝘯𝘴𝘦 (1776)