JK has been so thoroughly framed as a villain that, at the very best, people will pretend this never happened. And at worst they'll be treated as brave heroes
I wouldn't bet on it. Yes, the rabid TRAs will add them to the anti-women hall of fame but the more moderate #bekind onlookers will want to take a step back from this. My uni age daughter was fully on board the rainbow bus but the shocking abuse JKR got after her essay last year really did give her pause for thought about who and what she was supporting. She's done a lot more reading and thinking since and is much more feminist in outlook now.