So the original poster was a user named theoculous, who had posted in /r/twoxchromosomes that she had been sexually assaulted. She then later cross-posted to the now defunct /r/reddit.com saying she had been sexually assaulted along with a link to imgur showing a picture of her bruised/scratched face.

A user named I_FRIENDZONE_CATS who, for whatever reason, scoured through theoculous's comment history and found that she had a history of very skilled makeup artistry. Her skilled makeup artistry, along with a rage comic from theoculous's history (crafted months beforehand), the fact that she cross-posted about being assaulted, AND the fact that someone earlier that very day had lied about having cancer led I_FRIENDZONE_CATS to "be the tiniest bit skeptical" of the legitimacy of her assault.

Eventually, and due to the evidence brought up by I_FRIENDZONE_CATS, the hivemind collectively accused her of lying and attempting to "cry rape", as it were, in order to garner attention or get a man in trouble. It's going to be hard to separate now -- as people have deleted their posts or added posts after the truth was found out, etc. -- however, I can assure that the tone of the thread was quite toxic prior to theoculous commenting to the validity of her situation. theoculous was eventually able to confirm her situation, going so far as to make another post in /r/TwoXChromosomes with links to an inspector's business card, as well as a video showing her cleaning her wound.

Both I_FRIENDZONE_CATS and theoculous have since deleted their accounts. For what reason, I cannot be sure. I know they were both active in the months after the incident, however the deletions of their accounts could still be a result of the fiasco.

I still feel a little bad for I_FRIENDZONE_CATS. He literally only said he was "the tiniest bit skeptical", but still offered his condolences. Unfortunately, the wrath of /r/TwoXChromosomes was swift and absolute.

Related links/readings:

1. Original /r/TwoXChromosomes post by theoculous
2. Xpost to /r/reddit.com by theoculous
   • Picture from said thread by theoculous
3. Comment by I_FRIENDZONE_CATS to theoculous's post in /r/reddit.com [it has been edited, however the original message is still intact]
   • Picture found by I_FRIENDZONE_CATS of theoculous's makeup skills
4. Comment by purpleloki regarding theoculous's "related" rage comic
   • Link to the rage comic
5. Subsequent post in /r/TwoXChromosomes by thoculous showing proof that her situation was legitimate.
   • Video of theoculous washing her wound

TL;DR I_FRIENDZONE_CATS found evidence that theoculous might be faking/making up the story of her assault. Hivemind blows up, bears fangs against theoculous. It turns out theoculous was telling the truth. /r/twoxchromosomes fired back against I_FRIENDZONE_CATS and others who commented negatively in the thread.