[Run_DOS_Run]

>what stops the state from just asking the domain registrar for the details of who purchased the domains

Some domain registrars don't ask for your personal data and the registrars who ask for it won't verify them.

>then ask the datacenter who owns the server at IP x ...

Many datacenters in China and Russia doesn't care about some warez and if the zlib staff pays over Tor with cryptocurrencies the datacenter also don't know who rents the server