These are interesting, because from an outside observer what's described as the allegations here don't seem particularly damning, with the exception of the host

These are interesting, because from an outside observer what's described as the allegations here don't seem particularly damning, with the exception of the hostile work environment allegation against Greg, however the only significant allegation is completely irrelevant to the larger statements made in the letter. It seems like they are making very strong statements but not really supporting them very much in the "details", and didn't sign it. I'm not sure I can take anonymous allegations with minimum details at face value.