The self-vote issue can go away, but then people will just set up a new account and upvote the heck out of that one, too.
See, many people say this, but those other duplicate accounts won't have any Steem power, so would those little votes from the duplicate accounts even matter?
And if they have a big amount of steem power and rig the system, those duplicate accounts will be pretty obvious. Absolutely rubbish comments with a good amount of $$$$$.