I wish people would be more mature about their reaction to this, as well as other people's reactions, regardless of whether they agree or disagree with the choice.
I'm not opposed to piracy, though I understand the risks that come with a platform allowing potentially pirated content. While I respect the decision and see the reasoning behind it, I don't agree with it, and will likely change my home instance to one that allows me to continue communicating with those communities, as I was subscribed to one of them.
I'll still be participating in communities hosted here, and I hope that with this decision, the admins' concern about being potentially sued is substantially alleviated.