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“The DWeb also comes with some significant legal and regulatory risks. It would make policing cybercrime, including online harassment, hate speech and child abuse images, even more difficult because of its lack of central control and access to data. A centralised web helps governments make large corporations enforce rules and laws. In a decentralised web, it wouldn’t even necessarily be clear which country’s laws applied to a particular website, if its content was hosted all around the world. This concern brings us back to debates from the 1990s, when legal scholars were arguing for and against the influence national laws could have on internet regulation. The DWeb essentially reflects the cyber-libertarian views and hopes of the past that the internet can empower ordinary people by breaking down existing power structures.
Decentralised systems also don’t necessarily abolish unequal power structures, but can instead replace one with an another. For instance, Bitcoin works by saving records of financial transactions on a network of computers and is designed to bypass traditional financial institutions and give people greater control over their money. But its critics argue that it has turned into an oligopoly, since a large percentage of Bitcoin wealth is owned by a very small number of people.”

Source : Web 3.0: the decentralised web promises to make the internet free again