Well I have been reading this thread. I think it has nothing to do with either dogs or rock climbers, so why don't we leave them out of it.
I think it has to do with an unfortunate trend that is growing in our society. A narcissist often comes along who wants to show off how smart they are, and that rules (that are written to benefit most people) do not apply to them. And the unfortunate trend is that a lot of folks "celebrate" this behavior and lionize the narcissist. Perhaps they want to emulate, but are not quite enough of a show-off? Or maybe they don't have the resources to pay the fine or whatever, so they are more cautious? So they express their frustration by fawning over how smart and clever the rule-breaker is.
Lots of laws are frustrating, like speed limits. I can go 100 mph in the 35 zone, and if I get away without doing any damage to anything or anyone, then I can proudly say "I welcome you to let me know how I affected anyone else on the [road] in a negative way." That doesn't make it right.
I don't think most people like to see others flaunt the rules that they themselves are following. It's like someone cutting a line in grade school. It's clearly unfair to the rest of the group.
However, I don't advocate for blind obedience. One should consider the spirit and the letter of a law or rule to try and understand it's goal. A 'rules is rules' mentality strikes me as willfully ignorant and is on the other end of the spectrum of 'rules don't apply to me'. From what I can tell here, the person in question likely follows most rules and is a productive member of society, and is likely in the middle on that spectrum, just like most of us.
A narcissistic behavior is different than being a narcissist. One would have to spend some time with the individual to make that kind of diagnosis. Narcissists are not typically described by anyone as nice, caring people. They are typically unable to consider others feelings (as opposed to a willful disregard). It's a disorder that impacts one's life.
To me, the post about Acadia looks more like hubris. People often overestimate their ability and underestimate risks. When those combine with something out of one's control (e.g., weather), disaster can strike. When one does something repeatedly with no consequences, the objective risk doesn't change, but the perception of risk may diminish. This is how very skilled people sometimes perish doing seemingly simple things. Arguing that something is safe because nothing happened is to ignore the big picture.
Laws and rules are often written about the big picture, which to an individual may seem burdensome. As for dogs on the precipice trail, I think it's fair to say that if dogs were allowed, the odds of a negative incident go up significantly. People not committed to their dog's safety and the safety of others would make poor choices. As a result, no dogs are allowed.
To me, the rule is reasonable, and following it is part of living in civil society. That said, I wouldn't care if they removed the rule and just put up a "Beware of falling dogs" sign.