I'd be curious to learn how many of these children actually decided to engage in activism themselves. If there's anything I learned while in competitive sports, it's that parents have no problem forcing their kids into things the kids don't care about because they want their kids to be famous professional athletes and I imagine this situation is similar.
Its like taking your kid to a strip club. Its putting your child in danger to begin with. Of course trolls are still responsible for their behavior, but the parents are not off the hook.