There is such a difference between someone not being convicted - which could be due to a variety of factors (including of course being innocent), and a purposely false allegation. Personally if it was proved that someone made a false allegation for malicious reason, I think they should be named and sent to jail.
I'm disgusted at the pp who's friend lied because she was in a bad place, I don't care how bad a place you are in, it doesn't give you the right to destroy the life of someone who has done nothing wrong. And the book should be thrown at you if you do so as to provide some sort of a deterrent.
I say this a rape victim myself, women like her make it 10x harder for genuine victims to get justice, because it puts the element of doubt that there is potential for the victim to be making it up.