The thing is, you can control a neighborhood, a country etc. from attackers and establish control over violence.

How can we do that, if we would like to preserve relative anonymity and global nature of the internet?

People can indeed form cooperatives to handle the protection, but this is hard to manage globally as an entity. DDoS protection is done by primarily having too much capacity to tank it and then filter it. The required investment is rather high.

This seems like one of those cases where you need to assign responsibilities and obligations to those enabling the damage, even if their offerings also enable a lot of good. If you have the capacity to offer cheap/free VPS, then you also need to cover the cost of protecting against the DDoS attacks that service enables. You don't get to offload that burden on to the victims. If that makes your VPS offerings more expensive then so be it; that's the result of pricing in the externalities.

You can’t have both ‘sockpuppet-grade anonymity’ and ‘held liable for their actions’ in the same society, whether Internet or otherwise. Both in reality and online, those that create sockpuppet corporations-slash-identities are unmasked only when their web of sockpuppetry is pierced by e.g. ‘reused a mailbox’, ‘used a neighbor’s identity’, ‘used a family member’s identity’, and so on. Until such investigations, sockpuppets get away with billions of dollars-slash-gigabits of crimes every year, and barring the ever-incompetence of most criminals, the Internet is a vast improvement over shell corporations in that regard. Still. It is technically possible to be able to ban the controlling human of an online sockpuppet without violating their anonymity, but we lack the societal infrastructure to do so — and since our own techno-utopian societies have invested no effort in doing so, it seems like the core utopian ideal could be ‘freedom from consequences’, rather than ‘freedom of anonymity’. If that’s a valid interpretation, then the core issue is not ‘preserve relative anonymity’, it is ‘preserve relative non-liability’, which may offer new avenues for much cheaper investment than pseudoanonymity would cost.

> People can indeed form cooperatives to handle the protection, but this is hard to manage globally as an entity.

This is a fascinating idea. Is this something anyone is working on?