Not so respectful
I do not understand why you would sign your post respectfully when clearly it was not.
The chap asked a simple question directing it at no one in particular. If you read it and did not have the answer then move on. If it was offensive to you then report it. Somehow I doubt it was the case.
If you acted like that to an OAP on a bus I would speak out also, therefore I cannot act differently on line. Courtesy costs nothing both in the real and virtual worlds.
Rant over....