I assume that she is nominated on the basis of her lengthy post about Benjanun Sriduangkaew / Requires Hate / Winterfox / etc. I did not discuss this at the time—I found the entire topic disproportionately upsetting because RaceFail [*] (speaking of which, do NOT!!! read the comments)—but that post has serious issues. Yes, it managed to get widespread attention to genuine instances of threats; but it also places people on the "target" list for being called "misogynist" ("Anon, MOC Writer") or for criticizing their writing only (Kress, Adrienne; Lord, Karen). There might be more, because I haven't been able to make myself closely read the accompanying text, I just looked at the Appendices; I recall from back in November seeing criticisms of the framing of the post, but I went back through my reading list of the time and couldn't turn up anything linkable.
(ETA 2: I have now read all the text, see comments for a little more discussion.)
As a result, I have serious doubts whether this post ought to garner its author a Hugo. I encourage those voting to carefully consider the question.
(Anon comments are screened; be polite and sign your comment with a handle for continuity of discussion and I'll unscreen you. If you're new here, note that I moderate comments for gross incivility, anon or not.)
[*] ETA: It has come to my attention, in a genuinely friendly and caring way, that this could use unpacking for people not on my access list. I was upset because I believed, and continue to believe, a number of the first-person accounts of Sriduangkaew's harassment and threats, and because I believed Sriduangkaew's apologies—lousy though they were—were going to work, she was going to get a pass: every time I see, for instance, Elizabeth Bear or Teresa Nielsen Hayden lauded as being especially clueful on questions of oppression, or put on a con panel about codes of conduct (for fuck's sake!), it's like being poked in a bruise, and they never made even lousy apologies for their behavior during RaceFail. My opinion of any of the people who came forward has not changed from what it was, I do not put credit in Sriduangkaew's statements, I do not believe we interacted before her identities were revealed, and I have not interacted with her since.