On Stack Overflow I asked a specific question about a UML diagram. The next day someone changed my question to say it was not about UML diagrams and instead focused on a secondary issue I was having even though I very clearly showed the UML diagram, the code I was working with, and where I was having the primary issue.
They changed not only the question title, but the content of the question and the tags of the question. This is a fundamental change of the question as a whole which would only serve to prevent me from getting a complete answer.
I was of course able to change the question back, but I could not see a way to contact the user who did this or seek help about it and the ability of someone else to do this makes me very uncomfortable especially since I wasn't notified of the change.
How should I ordinarily proceed in such a situation?