Earlier quoted context omitted.
The problem with those is always going to be sybil attacks: anyone can create tons of accounts and upvote themselves. Even cross-verification can be defeated: you just make a small network that upvotes each other in some obfuscated manner. I think there are only two long term solutions: - Introducing some kind of proof of work -- e.g. you do work to downvote/upvote; - Some very "localized" reputation -- e.g. you trus…
I don't think "proof of work" works here because upvoting/downvoting content needs to be cheap... how do you make it expensive for a dedicated malicious force but cheap for legitimate ratings? Proof-of-work as a sort of "sign-on" to enable propagating a new "account"? That is, you need to have 1 Ghz-hour of wasted computation in order to introduce a new cryptographic hash into the network as a sort of "payment to cre…
Having no reputation wouldn't mean you can't do anything -- just that what you do is less trusted and has lower priority.