The reason why there haven’t been other reports might be that this is a particular case: It could also be that, since Madison was (clearly, watch the video from before she was employed) totally star struck with Linus, she would also have been very flirty with him; and that was, in turn, misinterpreted by other people (esp some other management apparently) as an invitation for them to treat her like a sexual object (I’m not saying that she ever might have wanted this. I’m saying that many nerds, for some reason, think regular women might want that).
That might be why she was treated like this while others aren’t (assuming they really are, in fact, not). Never the less, not acceptable, you can always fire someone who is making the workplace unsavory by being a tease, you don’t have to be a creep…

Edit: reworded to make it clearer that Madison being potentially flirty with Linus is a theory as to why all this might have happened, and absolutely not a sure fact. Remember, we’re talking about allegations, for now. Nothing is for certain at this point.

Edit 2: downvote away, but Madison was clearly star struck, she also was clearly naive. Mistakes happen, I also put myself, when younger, in situations where I teased people out of naivety. FWIW, the result was fairly similar to what I described above. So whatever, you can refuse to admit this can happen, or you can recognize it might have been the trigger. And to be perfectly clear, none of this shifts the fault away from LMG. Young, inexperienced, starstruck employees, however prime for abuse, are the employer’s absolute and entire responsibility. Sexual (mis)conduct has nothing to do in the workplace (and if you work at legal a sexual provider, misconduct still has nothing to do there).