After Charlottesville and the murder of Heather Heyer, hitherto Nazi-friendly internet companies have found their boots and their banhammers. The angry right has for some time anticipated this eventuality, and colonized or established replicas of key services and platforms. 8chan, Voat and Gab are the most well-known examples, respectively resembling 4chan, Reddit and Twitter. Adi Robertson writes that the internet's plumbing, the world of domain name registrars and load mitigation, will be harder to replicate. Why the alt-right can’t build an alt-internet. Even if such a registrar could ignore bad PR, activists could still lodge complaints with the registries, which...