Update: For a start, it helps if the "wronged party" doesn't happen to be dead, dearie. Not to mention having included the "slander" in his own, published, curriculum vitae.
Update 2: Oh, I'm very careful to be able to document any positive statements I make and most of the conditional ones and am always careful to phrase speculation as speculation. And I would have no problem with posting a retraction if any factual misstatements are brought to my attention and demonstrated with valid documentation. I just haven't had to in this case because it is indisputable that V.B. was a member of a group that advocated pedophile rape (there being no such thing as valid consent given by underage children) and that he was associated with those atheist organizations and people as there is every reason to believe they knew what he was about.