I had 15k reputation score at one time on SO. It recently dropped down to due to people deleting their accounts. There are review queues which appear on the top nav incentivizing power users with enough rep to go in and take action like closing requests.
Having met many SO power users in group settings over the years, I feel that there is very little tolerance for questions that require effort to understand. If it's a simple question posed by a non-English speaker that needs some thought, then it doesn't belong (but that's why comments were introduced later.) The same goes for a deeper technical question where the author gets it all out but doesn't take the time to structure or format it. The volume of behavior like this differs based on the type of question and experts prepared to weigh in.
This gets compounded by the up and comers on the reputation scale. They get their special powers and see this BOFH close behavior and replicate it. Over time it starts to become the norm. I had the ability to vote for reopens and these same people would argue about why this was a bad idea. They weren't prepared to admit they were wrong and felt they were doing God's work by ridding the site of poor questions when some of us even had the ability to make edits to clarify them.
I just opened the site after some time away. At the top, pushing the question list below the fold, are: Reputation, Badge Progress, and Watched Tags blocks. The Interesting Posts for You question feed is below that and I have to go see how that is constructed. I only ever wanted the firehose of new questions with my tags highlighted.
EDIT: The behavior I noted above is yet example of why I always want to know how a job candidate deals with ambiguity. In my experience, this has a massive impact on the ability to work independently, not piss off colleagues/clients/customers, and make good decisions.