The Universal Declaration of Human Rights has it that "everyone charged with a penal offence has the right to be presumed innocent until proved guilty according to law in a public trial at which he has had all the guarantees necessary for his defence." This is a kind of legal protection against criminal conviction—you cannot be declared by the state to be guilty of a crime, or punished for it, unless your guilt has been proven.
The presumption of innocence is rightly considered a pillar of civilised society. But people have a tendency to over-apply it in irrelevant cases. The presumption of your innocence means that the state can't punish you for a crime unless it proves that you committed it. That's it. It has nothing to do with how one individual should treat or think about another, or whether an organisation should develop or continue a relationship with an accused individual. The presumption of innocence doesn't protect you from being unfriended on facebook, or shunned at conferences, or widely thought by other people to be a criminal. It just protects from being criminally convicted.
The weird world of academic philosophy this week is digesting an article that includes serious allegations of sexual harassment by Yale professor Thomas Pogge against philosophy students. While most of the people whose reactions I'm reading are expressing disgust at Pogge's behaviour and gratitude for Fernanda Lopez Aguilar, the woman who has come forward with the story, there are some (including Pogge himself, as well as some of the People who Leave Comments on Blogs) who caution the broader world from jumping to conclusions, on grounds related to the presumption of innocence. Pogge's statement discusses "trial by internet"—but since "the internet" is not contemplating the use of state power against his liberty, whatever metaphorical sense in which he is undergoing a "trial" is not one where he enjoys the presumption of innocence.
The admonition not to pass judgement about the allegations is simply the admonition to ignore them. "Don't believe anything unless it's been proven in a court of law." But this is just a ludicrous epistemic standard. Do you care whether powerful men in academic philosophy are using their stature to coerce students into compromising sexual situations? Then you should be interested in credible testimony to the effect that this one has been. Don't be tempted by the fallacious inference from it hasn't been proven in court to you have no way to tell whether it's true. (This, incidentally, is also why it makes sense for universities to have sexual assault policies.)
Moreover, it's not in general "jumping to conclusions" to accept someone's word. We learn from other people about what happened to them all the time. Talk of courtroom standards of evidence can make us forget the fact, but in general, we can get knowledge from other people. There's a temptation to think "it's just a he-said–she-said situation, so there's no way to know what really happened". While there are of course some cases that are like that, it's not in general true that any time testimony is disputed it can't be known to be true. Sometimes someone tells me something, and I thereby come to know it, even though someone else denies it. This is especially likely when the thing told is generally plausible, and fits well with other things I know, when there's no plausible explanation about why the testifier would say it if it weren't true, and the denial is both weak and self-serving. All these features seem to me to be present in the current case (and in many similar cases).
I believe Aguilar's allegations. They are serious and credible. They cohere with other stories many of us have heard about Pogge. The asinine hypothesis that she'd make them up out of spite, or for some kind of personal benefit, is the risible product of a preposterously misogynistic imagination. I think it'd be an epistemic error not to believe them—and a moral error too. It would be derelict for us as a community to ignore that which it's reasonable for us to believe—indeed, what which I think we know.