You're about 24 hours off base in our particular case. We were in there a day earlier. That, and the fact that all the slopes we were skiing empty into a valley well below the highway; they're not targets for control.
My original point, which you've just punctuated beautifully, is that its usually best to assume the more likely 'honest mistake' possibility in these instances, rather than give into the armchair instinct to dog pile on people you don't know regarding a situation you weren't involved with.
Or, you can track down the perps and cite them. LOL.