[dmatech]

Legally, there's no requirement that you moderate a forum so that its contents can't facilitate the commission of a crime (outside of a few things like DMCA anti-circumvention). If this were the case, everyone would have to be extremely careful when discussing anything dangerous, and most people would be hesitant to participate in the discussion at all for fear of being exposed to liability.

In fact, even the person posting something like medical misinformation can't normally be sued.