I definitely think people like Roman Polanski need their work to be eclipsed by their crimes. I won’t watch anything by Polanski, he deserves to be remembered primarily as a brutal rapist, his work should not be celebrated.
But Polanski is an extreme example. I’ll still watch and enjoy something like Firefly, for example. Although, learning that Whedon had been kind of a verbally abusive creep, and that Baldwin is kind of a right-wing shithead does kind dampen my enthusiasm for the show in a way I can’t help.
When I watch it I tend to get distracted sometimes by some of the elements that now come off as more obviously sexist than when I first watched it.