OK, these guys definitely aren't the sharpest tools in the shed. Having said that, who here, after reading the headline, thinks that rock existed in that state, (balanced so precariously that a guy could just push it over), for 170 million years? This is a case of journalists not understanding the quotes they print. Weathering and erosion are constant forces, not something that happened in antiquity. If that fat shlub had the strength, (even braced) to topple that rock, it was about to fall anyway. (5-10 years, tops, probably within 1-2 years.).
I know it's not going to be popular, but I actually think the guys were trying to fix what they saw as a dangerous situation.These guys know that kids can't resist that kind of thing. Should they have called it to a ranger's attention instead? Yes. Were they acting out of pure vandalism, I don't think so. Also, if a ranger had been notified, and decided it should come down, quietly and without video, would that make it alright?