Laura Tanner is a PhD student in Feminist Studies (which is a separate, degree-granting department, which is not that common) at UC Santa Barbara, and tweets here. She is a lesbian who also has incorrect views, it appears, about transgender issues who is now the target of an organized campaign to throw her out of the classroom, complete with an open letter denouncing her for transphobia by her fellow students (!) (with friends like that...). Let's see whether the Administration of both the department and the university will stand up to this attack on the free expression of a PhD student.
ADDENDUM: As several readers pointed out, Ms. Tanner's Twitter feed is not doing her much credit; she's as badly behaved, on the other side of the issue, as some of the Twitter Red Guard in philosophy. She should not be immune from criticism, but she should still be free from the kind of institutionalized sanction the open letter calls for.