I take it on a case by case basis, based on my gut reaction (I’m not going to do in-depth research on every artist’s background before enjoying their art).
But, in general, I won’t buy any type of art, if the artist has done what I consider a heinous act (e.g. murder, rape, physical assault, etc., not political affiliation, being a jerk, the color of their hair, etc.), and only if buying their art (in any form) directly benefits them. If they are dead, or if their art is in public domain, etc., I see no reason to not enjoy their art. In fact, I could argue that their art is one way they pay back society for the heinous acts they committed.
Let’s take Bill Cosby as an example. I’m not going to throw away my Cosby Albums (if I still have any), because I already paid for them, and he already received residuals on that. Throwing them away now would only hurt me, not him (not that I listen to them anymore, and probably wouldn’t enjoy them knowing what I know). On the other hand, if Cosby gets out of prison and cuts a new album, I won’t buy it. I now know that he’s a rapist, and he would benefit from the sale. And, I don’t mind denying people associated with Cosby cutting a new album (or concert tour, or whatever) because they now know that he committed a heinous act and I don’t believe they should be associated with that.
But, there certainly are a lot of grey areas. Should you watch re-runs of The Cosby Show, if Cosby still gets residuals on them? Well, I don’t want to benefit Cosby, but what about all the other cast and crew who worked on that show who did not know Cosby was a rapist at the time? Should they lose out on their residuals too, because the star committed a heinous act? And, even Cosby’s family (who I assume are not guilty of any crime), should they suffer loss of the Cosby estate residuals because of the acts of the father? Hard to say.
So, I follow my gut reaction, case by case.