Why are they even threatening? This is pretty scary. They have a specific role, and it isn't judging who is allowed authenticate and who's not! This is an even bigger issue than the network level attempts to censor and much bigger than the DDoS protection dropping. The internet is being fundamentally broken by this sites stalkers and harassers and most of the media and tech is either ignoring it or actively cheering it on!
If you promulgate hate, do not expect to be able to participate in the network.