probably not. users can flag anything they want for any reason.
but dang unflags when it's not flagged for good reasons. And I would think he's awake now.
I don't think he does that very often, since he doesn't know the reasons. You could also try contact him directly instead of expecting him to see a random comment you left.
are you saying that dang doesn't have an alert that is triggered when a match of \bdang\b is found?
I've seen more than once people "invoke" dang by simply drooping his name and then voila! he instantly appeared.
as far as I know he doesn't. The site guidelines even explicitly ask to email.