Tripper, I was interested in the survey, but I have to say that the way some questions were written is quite biased/leading. For example, I can’t imagine that many dog owners will report that their dog negatively impacted other hikers’ experiences. I’m not sure they’d recognize it even if it did happen.
As a vet, and a dog owner, I can attest to the fact that many owners have very large blind spots where their own pets are concerned. I’ve been told by owners of growling, plainly aggressive dogs, “oh, he’s just happy to see you and saying hello!.” Yup. Big 'ol blind spot. 
As for hikers telling dog owners that the dog is behaving badly… well, that doesn’t happen very often, either. I know I never said anything when I was growled and barked at by a shelter-protective dog on the AT, or when I was barked at by dogs going the opposite direction on the trail, or when I saw dogs off leash where they were required to be on leash. I didn’t want to be rude myself. I thought the poor behaviour was self-evident, but somehow I don’t imagine the owner did.
Also, prehaps “neutral” might be a better option in the agree/disagree with certain situations section. I chose the middle option “undecided/unsure” quite a few times, but what I really meant was “it depends on the circumstances/neutral.”
Good luck on the survey.
Chipper