I have a more direct answer for you: moderation.

It's not all about how you distribute content. We must also decide which content do distribute, and that is a hard problem.

The most successful strategy so far has been moderation. Moderation requires hierarchical authority: a moderator who arbitrarily determines which data is and is not allowed to flow. Even bittorrent traffic is moderated in most cases.

For data to flow over bittorrent, two things must happen:

1. There must be one or more seeders ready to connect when the leecher starts their download.

2. There must be a way for a prospective leecher to find the torrent.

The best way to meet both of these needs is with a popular tracker. So here are the pertinent questions:

1. Is your content fit for a popular tracker? Will it get buried behind all the Disney movies and porn? Does it even belong to an explicit category?

If not, then you are probably going to end up running your own tracker. Does that just mean hosting a CDN with extra steps? Cloud storage is quite cheap, and the corporate consolidation of the internet by Cloudflare, Amazon, etc. has resulted in a network infrastructure that is optimized for that kind of traffic, not for bittorrent.

2. Is a popular tracker a good fit for your content? Will your prospective downloaders even think to look there? Will they be offended by the other content on that tracker, and leave?

Again, a no will lead to you making your own tracker. Even in the simplest case, will users even bother to click your magnet link, or will they just use the regular CDN download that they are used to?

So what about package repos? Personally, I think this would be a great fit, particularly for Nix, but it's important to be explicit about participation. Seeding is a bad default for many reasons, which means you still need a relatively reliable CDN/seed anyway.

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The internet has grown into an incredibly hierarchical network, with incredibly powerful and authoritative participants. I would love to see a revolution in decentralized computing. All of the technical needs are met, but the sociopolitical needs need serious attention. Every attempt at decentralized content distribution I have seen has met the same fate: drowned in offensive and shallow content by those who are most immediately excited to be liberated from authority. Even if it technically works, it just smells too foul to use.

I propose a new strategy to replace moderation: curation. Instead of relying on authority to block out undesirable content, we should use attested curation to filter in desirable content.

Want to give people the option to browse an internet without porn? Clearly and publicly attest which content is porn. Don't light the shit on fire, just open the windows and let it air out.