I think it is a good idea to keep this in mind. No justice system is perfect. Sometimes a guilty person goes free, and sometimes and innocent person is convicted. But I think because the principle of the accused being "innocent until proven guilty" is so engrained in the US legal system, we get much more errors that allow guilty people to go free than convictions of innocent people.
That's not to say we should make light of those cases were innocent people are wrongly convicted. I've seen some discussions and books advising women to make false accusations of abuse to gain the upper hand in divorces. We have gender specific laws (Violence Against Women's Act) that make this pretty easy. But even with the normal laws there are risks. And I agree that people who make false accusations should face the same penalty their false accusations would have brought to the accused. I won't even begin to try to imagine what it must be like to be molested as a child, and perhaps I shouldn't make this rape comparison, but nevertheless, I have wondered to myself, whether I would rather be raped or false accused of rape if I had to choose. Even if some guy overpowered me, depending on the injuries, the physical injuries could be temporary though the emotional mental injuries could be permanent. But just the accusation of sexual harrassment can blacklist a guy for the rest of his life. Of course, as a guy, I don't face the same physical risks that women and children face (though most acts of violence are against men), but the risk of false accusation certainly is a factor in my behavior and where I will go.
All that said, as far as the US legal system goes, I don't think we need to push the boundaries of "innocent unitl proven guilty" any further. The principles and laws we have will work if executed correctly. But certainly the penalties for false accusers should be increased. And I don't think that would be any deterrance to those who were actually raped or abused. The same principle of "innocent until proven guilty" would apply to those accused of making a false accusation. And because our justice system tends to make more errors in that direction, I'm sure we would have some situations where it can't be proved that a rape occurred or that the person made false accusation.