People need to know what a monster she is. Providing good factual information about what she is doing with her money is great. Critiquing the books is great; giving people some analytical tools to help them let go of emotional attachments to some its shitty themes is also good. So I'm not saying "don't be critical". But being mean for the sake of mean because you're *right* doesn't prove anything except that you're an asshole. Ironically the kind of asshole JKR valorizes.