This doesn't sound decentralised to me. Bitcointalk also uses miners and blockchain. Should the forum be hosted on a blockchain and all posts have to be confirmed by miners? Maybe you have to pay a fee every time you post?
People only want rights and power, but no obligation.
Let's try to imagine a decentralized forum. Who is going to pay for it? There are costs in running a forum. If the forum goes well, it will be lucrative, however it has some costs to be running.
People know bitcoin is decentralized, and then think that everything should be. That's make no sense. A global cryptocurrency is important to be decentralized because it cannot be shut down neither controlled. As many people will have reasons to try to shut it down or control it. But a decentralized forum? A forum is like a business, someone needs to control and manage it.
Well it would probably work like bticoin or bit torrent and there isn't once central authority, but as theymos said, everyone would have to download the client and everyone would share hosting. I like the intention behind a decentralised forum, but it almost certainly wouldn't work very well. It would basically be what this forum would be like if there were no mods at all. Whilst less moderation is generally good, we can also see the problem that arises when mods take a back seat. Spammers and plagiarisers would run rife and the burden is left up to each individual user to moderate which would quickly become tedious. At least mods get paid something for their troubles here but users under a decentralised forum would have to do it for free and I'm sure they'd quickly grow tired of it. Imagine if every user had to nuke every spam bot they saw. You'd probably spend more time 'moderating' what you saw than you would in actual posting.
