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When PGP was released in the early 90s, one of the arguments used against it was "child porn". When P2P networks using DHT became viable earlier in this century, one of the arguments used against the networks was "child porn".

The tech still remains and still functions, arguments or not.

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The difference is between "the technology" and an "implementation of the technology". Sure, P2P DHT exists. Just like blockchains exist. But a specific blockchain, which is append-only, is trivial to make illegal by embedding illegal content in it, making every user of it technically in possession of illegal material. You can use a DHT w/o breaking the law. You cannot store child porn on your computer without breaking the law.

In some cases a link to a file is enough, which would implicate DHT, but due to the nature of the distribution would not compromise the whole network. Cf. Pirate Bay.

What you say is completely true and I agree.

So who's going to shut a blockchain down? I don't see it happening.

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