Scum would need to have a role that can redirect and a role that can cause actions to fail on the same night. This is in addition to them having a 1x Janitor. The role that redirects would need to be poorly used as well, and the role that causes actions to fail would need to be a 1x w/the Janitor or something.
Also, this means that Kill cannot be scum w/Orihime WRT your theory, because he was rolecopped as Vanilla. Conqueror's interactions with her seem strange as scum/scum, and I already know that I'm town. So even if she wasn't more likely to be town off of actions, the person she makes most sense as scum is w/you anyways.
I don't think Scum!Orihime volunteers to be copped though (doubt there's a Godfather in this game specifically to counter a 1x Cop).