A moderator closed a 1.5 year old question[1] with 20 upvotes, 25 stars, 9000 views and an answer at 28 upvotes without any vote or consultation, because it was too broad for him. StackOverflow has all the tools to allow the users to moderate the platform by themselves, kinda democratically. From my experience, it works and the decisions are most of the time justified. Then it's mind blowing that someone can skip all the closing process/votes and close a well-rated question with a useful answer in his sole opinion.
And there is no way to report/flag/discuss a moderator actions on Stack Overflow. You can at least do that on Wikipedia.
[1]: https://stackoverflow.com/questions/41250087/how-to-deploy-a...
Edit: the question has received 5 votes to reopen, thanks HN!