Reddit&#x27;s not the same, though --- it&#x27;s centralised, for a start.<p>A really interesting (and probably really hard) project would be a proper decentralised Usenet replacement, with proper identity and reputation control. It might actually be something that blockchains could be good at, if you could avoid the requirement to replicate the entire database on every machine.<p>It might be feasible to have a single blockchain for identity and reputation, and then have each &#x27;newsgroup&#x27; have its own, referring to it; that way I should be able to reduce the disk and bandwidth footprint to something reasonable.<p>Coming up with an appropriate costing system so that spammers were priced out without also requiring real money to actually use the thing would be the trickiest part, I think.