I posted an answer under the question What was the reason for Swami Vivekananda's Death?
Today morning, I had received a message that someone wants to propose changes in my answer. There is nothing wrong, if someone wants to improve the answer.
To my surprise, it was done by some an anonymous user.
My question is Who is the an anonymous user?
Does this site permit to post/edit by an anonymous user?
Is it a malware run by some third party?