Marion Zimmer Bradley was a paedophile abusing her own kids. She should have been put into a prison. The readers don’t need to boycott her books necessarily, assuming that the incomes are to be given to NGOs fightning paedophilia. The sad and alarming thing is that some friends of her claim that they didn’t observe anything wrong in her relations with children. And that her second husband was a damned paedophile, too. The dubious things might be actually some descriptions in her books — a rapist bastard avoiding any legal punishment in Two to Conquer, a brother having a crush for his sister in The Winds of Darkover and Stormqueen! as well. Or the strange repulsion towards sex during pregnancy (some transfered remorse?). It might be connected with the terrible things she did, or might not.

These things should be important if we’re discussing this problem.

However, I don’t see the point of some claims, especially on Goodreads and especially concerned with The Mists of Avalon. Marion Zimmer Bradley wasn’t a sexual criminal because she was a feminist/non-heteronormative/sceptic about Christianity/was writing about extramarital sex. Ursula K. LeGuin was an atheist-feminist. Does it mean she was a paedophile? E. M. Forster was a gay depicting some religiously sceptic characters in A Room with a View. Does it mean he was a paedophile? Balzac, Marquez, Sigrid Undset, Boccaccio—they all wrote about extramarital sex a lot, even if their descriptions weren’t as explicite as at Bradley’s. Some of them were anticlericals of sort as well. Does it mean they were paedophiles?

Nope.