A verdict of not guilty doesn’t mean he didn’t do it, it just means it couldn’t be proven to a high enough standard. It doesn’t mean he DID do it either, but if he did and his accusers ended up being punished for false accusation, that would send a chill down the spine of any person who has been assaulted and is thinking of pressing charges on their abuser.
Yep, going after accusers should be something that only happens in extreme cases, like the accused being able to prove they weren't even in the same State at the time or in some other way being impossible for them to have committed the act.