Look to earlier posts. User kab didn't use "insert quote" button when citing Fiaz's text to show in red where Fiaz had made a common grammar error.
Kab wrote "Read again..." and copied this post: https://bitcointalk.org/index.php?topic=314402.msg4562197#msg4562197
The copied post contained "Fiaz". Simple.
It was quite obvious to people who read whole thread carefully, yet it was strange enough for the new ones.