I think the main issues to overcome will be making sure that only registered users vote, and only once per voting event. This could be achieved by distributing

I think the main issues to overcome will be making sure that only registered users vote, and only once per voting event. This could be achieved by distributing an undivisible votecoin to each registered voter upon presenting their proof of registration or eligibility. But then there's a weak point of someone giving/receiving more than one votecoin (bribe, threat, blackmail, etc) Even if there are checks and balances with number of votes vs number of registered voters, there's again the weak point of human element of data entry.