Only let verified accounts vote, perhaps that can counter the Multiple Accounts Argument. But of course the counter to that would be who verifies the accounts and what are the requirements for having an account verified. Well, my response would be to have a combination of requirements be it to have enough witnesses confirm an account is of a real person via links, phone numbers, etc, and say a certain number of Hive Power and a certain number of posts and a certain number of Reputation points. Also, make sure the account is at least 6 months old or come up with another magic number. And perhaps a certain number of required followers because that means the account must be representative of a real person. But then again, I am not sure how I feel about all of this as I have several accounts on Hive. but I guess you may only want one vote per person kind of thing or goes the argument.
RE: You cannot take away from the author that which does not belong to the author.