reputation is bad

The assertion that reputation is bad because it is unfair is a consequence of the general rule against hearsay in due process. Any repute consists of hearsay if not rumour, and must be excluded from a courtroom on that basis. For instance, a plaintiff's prior sexual history cannot usually be introduce in a rape case.

To undo reputation effects, identity theft is normal in some forums, so that reputation can be discredited on the basis that it arises from at least some cases of mistaken identity.