First of, no one was banned. Secondly, the wikipedia admin never said what was added to wikipedia wasn't true. I welcome anyone trying to prove otherwise.
All they said is that there was no direct source and they don't allow for original research even if the research is correct.
From your own link:
This is the only comment from Wikipedia admins on the subject. Someone saying that they banned anyone or said that what was posted wasn't true would be an incredible stretch.