I happen to like dogs a lot, but they are still an animal, no matter how you look at it. Our neighbors dog comes over all the time, and we give him treats (we actually bought them for him, not owning our own dog) he is a good dog. But there are many instances where this is not true.
In any case where I, my family, friends, other humans, my property - living or inanimate, are being harrased by an animal, no matter the number of legs, that animal will be defended against. If it so happens that my voice and size don't work, then I know my firearms will. Especially if the animal becomes a nuisance.
Dogs, as pets are loved very much, and also as pets they should be trained. I am in full agreement nealglen that any wild dog is an overgrown coyote. Just because they do not have the intelligence of humans is no excuse for them to not be able to be trained to behave within reason. Actually, dogs are much more easily trained than us humans are!! It is the responsibility of the ower to take care of this, or someone else will, as is life.