Just to add to my reply, with respect this is not a anything like a Sybil attack, a Sybil attack is normally initiated by one person using clone accounts to attack, in this case these accounts are from many users who signed up their individual Steem accounts via verified emails on our software, they have given us proxy to use their votes to vote on their author selection and on our posts for payment. This is exactly the same as giving another account proxy to vote on a witness, by the logic you are presenting, giving one account many witness proxies is a Sybil attack as well, and this is being done on the blockchain without any opposition.

I hope this changes your mind with respect to the Sybil attack reference.