> I don't think there's any way to handle spam/moderation in a fully anonymous decentralised network.
Surely you could have small bayesian engines running in each client, and coordinate ratings through DHT. It would still have the issue of somebody potentially abusing such engine to effectively DDOS certain types of messages (e.g. mentioning a certain party), but you could try and fight that with modern consensus techniques from the cryptocurrency world.
The lack of filter availability doesn't stop spammers bypassing even Google's uber-filters, so it's not much of an argument really. The arm race is what it is. The point is having a system that can react fast enough to remove the spam from most systems once it is identified.
> The point is having a system that can react fast enough to remove the spam from most systems once it is identified.
Then you need a system for distributing filter updates, and preventing the spammers from distributing bogus filter updates. Isn't this basically just the same problem as before?
Such a scheme seems open to spam by design. I don't think there's any way to handle spam/moderation in a fully anonymous decentralised network.