Diederik Stapel, responsible for something like 50-some retracted articles due to academic fraud, was apparently commenting on stories about him on Retraction Watch using a pseudonym. I thought his reply was interesting:
I thought that in an internet environment where many people are writing about me (a real person) using nicknames it is okay to also write about me (a real person) using a nickname. I have learned that apparently that was —in this particular case— a misjudgment. I think did not dare to use my real name (and I still wonder why). I feel that when it concerns person-to-person communication, the “in vivo” format is to be preferred over and above a blog where some people use their real name and some do not. In the future, I will use my real name. I have learned that and I understand that I –for one– am not somebody who can use a nickname where others can.