Somehow the user named Community managed to close a question as a duplicate yesterday. Community's vote to close was only the second such on that question. It looked weird to me - it doesn't jive. Community is supposed to be a bot, right? What is it doing voting at all? Does it have any other similarly dubious and sinister abilities of which I can be made aware?
SE have implemented a new button that lets you close your own question:
In the specific question you linked to, what happened was that @muru cast a close vote, and this made the following appear to the OP:
The OP saw it and agreed, so clicked on the button and, as a result, the question was closed and the OP's binding close vote is shown as originating from the Community user.
Don't worry, we still control the AIs, the bot is not on a
killing voting spree.