This is the picture of the 17 year old guy who killed himself after being falsely accused of rape:
A whole lot of people, myself included, would mentally draw conclusions about him, based on this photograph, like 'oh...his eyes look weird', or 'why is he smiling like that?', and similar. The photo might or might not have been altered before being posted online.
A big problem with all sexual assault accusations is that the definition of the offense is subjective and ambiguous; people are taught today that they have been sexually assaulted, 'if they feel they have been'. Maybe a woman doesn't like the facial expression on a doctor's face, when he is performing a physical examination. Maybe an intoxicated person enjoys physical 'horseplay' with one person but not with another. Maybe someone pretends to have been a victim, to show solidarity with some other person who claims to have been a victim.
Here's a good example: The 1991 rape trial of William Kennedy Smith. He was the son of Jean Kennedy, sister of John F. Kennedy, Robert F Kennedy, Ted Kennedy, etc., "The Kennedys" of US politics. He met a woman at a bar in Florida. They went to the family estate house, and had sex on the grounds. Part way through the act, he called her some other woman's name, she changed her mind, and he finished. She claimed to have been raped, because half way through a consenting sex act, she changed her mind. He was acquitted, but her identity was shielded by the court, and his reputation was destroyed.
Women falsely claim to have been raped or sexually assaulted all the time, for any of a number of reasons, often to assert themselves by having an authority figure intervene on their behalf. Sometimes they're hired to pretend to be past victims of someone accused of something by someone else.
Some people just think it's funny to tell lies about people. We all know plenty of people on boards, and in real life, like THAT.