Michael Shermer has been accused of sexually assaulting or perhaps raping one or more women. The veracity of any such claims is beyond my knowledge, so I have no comment on whether it is true or not.
But you have to wonder why Shermer's response is legal action to silence criticism, rather than a presentation or explanation of his interactions with the woman who accused him (or women, since a second has come forward).
Worse yet, Shermer is openly grateful to someone who is raising money for his legal costs - a person who has openly told rape jokes to get laughs. Shermer endorses such a person instead of distancing himself from him. Rape is not something to joke about.
Before I heard any mention of the "legal fund", I was inclined to take a wait-and-see attitude towards the accusations and evidence. But Shermer's willingness to accept help from someone who thinks rape is funny does not lend his position any credibility. He may get away with forcing the accuser to prover her claims in a court of law, but he will have to prove his innocence in the court of public opinion.