I have many close votes on SO so far. Sometimes (quite less frequently), I have been noticing that as soon as I cast the last close vote to a question, the question is closed and it's automatically voted down (again not always).
I don't think that that downvote might have been casted by some user on the site (still I don't know whether it was my illusion or not). I thought it might automatically be done by the community but I can't find any such mention there.
- Randomly poke old unanswered questions every hour so they get some attention
- Own community questions and answers so nobody gets unnecessary reputation from them
- Own downvotes on spam/evil posts that get permanently deleted
- Own suggested edits from anonymous users
On which criteria, it is done and by whom or it doesn't happen at all? Can I know this?