Just the punishing is reserved for the legal system.

For instance, at least in the US, we have pretty strong free speech laws, so you can publicly state opinions about almost anything, such things aren't reserved for courts.

I'm by no way a lawyer, but don't you have libel laws? I thought that's why newspapers use allegedly when reporting on such incidents.

Truth is an affirmative defense against a libel claim.

Sure, we have libel laws.

And you can be sure that The Verge had a lawyer look at this piece.

Only a court can order someone incarcerated or stripped of their assets. As an individual you're perfectly free to shun someone who you think is guilty of atrocious behavior even if they haven't been convicted.

No. We give up the right to use violence to the court system. Not justice in general. Ruining a rapist's reputation is a perfectly fine way to achieve justice, if that's what the victim desires.

Other ways to achieve justice outside the court system include protests, strikes, civil disobedience and so forth.

I don't think victims' desires are paramount in any way, regarding the perpetrator, other than their security and privacy. Some victims desire retribution. Others want to extend forgiveness. Neither of these things should be relevant to the criminal justice system.

Of course it is relevant. Cases tend to get much weaker if the victim refuses to testify.

The problem is that while I can admit that most of the victims are indeed victims. It is also possible that some might be accused infairly or inaccurately.So I would not really call it a fine way.

The general notion of "innocent until proven guilty" is simplistic even when applied to just the legal system. Even in criminal court you only have to establish guilt beyond a reasonable doubt. You do not have to "prove" guilt to the same degree of confidence as, say, the Higgs boson.

This means that a small number of innocent people are convicted every year. This is unfortunate, but less bad than the alternative — the only way to guarantee no false positives is to never convict anyone.

The legal system, like any other justice system, is about finding an appropriate balance between false negatives and false positives.

when we talk about proven in the empiric sense a margin of error is always expected. but what "innocent until proven guilty" guarantees is that best efforts were made to make sure that someone is really guilty. Trial by social media cannot reasonably offer such guarantees.

Also, I presume you would agree that the police and by extension the court have better means than your average newspaper for determining guilt.

While the legal system might have more power than the average newspaper, that doesn't mean that it is more effective at determining guilt.

I was raped 10 years ago when I was a teen. There is no evidence of the crime. No court is going to convict my rapist.