If you're not familiar with anarcho-capitalist theory, there's a concept called a DRO -- dispute resolution organization [1] -- that can perform arbitration functions in a decentralized manner, i.e. without a monopoly on judicial services like the state.
In the future, as the infrastructure matures, I'd be willing to bet DROs will arise to handle these types of disputes. Forthcoming DAOs can be more competitive by integrating dispute resolution clauses into their contracts.
For example, maybe there's a flag that must pass before any transaction takes place, and can fail if X% of DAO stakeholders vote to halt transactions and defer to a DRO for arbitration.
Hard to say exactly how things will evolve, but what's great about Ethereum is that contract law has the potential to evolve at a much quicker, cost effective pace than does the monopolistic, bureaucratic justice system we have in place today.
[1] https://en.wikipedia.org/wiki/Dispute_resolution_organizatio...