Educate me on rape shield laws. They seem created to hurt those falsely accused.

How do we in r/mensrights feel about them? Should we be working to educate people about them and/or working to get them repealed?

Let's take a hypothetical example where I think they work against the accused:

Bob meets Sue at a bar. They chat each other up, have a few drinks and eventually end up back at Sue's house. They have consensual, drunk sex. The next day(s) when she's sober Sue realizes that Bob is married/not interested in her/was a mistake/won't call her, etc... or maybe she regrets having sex with him because she's involved with someone else. She cries "rape" and Bob is falsely accused.

Sue has a history of taking random guys home with her and has a reputation of being the bar "slut."

Under rape shield laws this history & reputation couldn't be brought up at trial, right? It seems to me that it would be vital for Bob's defense. Essentially, the rape shield law is keeping the falsely accused from getting a fair trial.

Thoughts?

Opinions?

Am I wrong about this?