Also in general on abuse I think that if you aim to prevent people obtaining 90%-100% of vote value on things like:
- account-splitting-and-hiding
- vote bots (i.e. reducing delegation returns by downvotes on those using vote-bots)
- self-voting
Then accounts will obtain 90%-100% of vote value through:
- circular voting
- off-chain organised "black market" operations (i.e. like MB vote-bot which is harder to track)
- etc
In the end a vote has value and people will find ingenious ways to extract that value to its fullest extent. The harder it is to do just increases the marginal cut to middle-men for its organisation.
Every system is gameable in some way isn't it?
Yes! This is one of the reasons I like flat curation with the curation slider at the discretion of the voter. It removes all the incentives and just lets people vote for the content they like.
That is an experiement I have wanted to have run for 1.5 years too but I think it has less chance of happening.