I think it's not just about voter apathy, I think voters discrimination should be included too. Imagine if we have a return proposal and then you go and vote it because you think the proposal isn't good enough, then moments later the owner of the proposal is in your DM asking you why you've downvoted their proposal and asking you to remove it. Personally I think Hive users will gladly vote especially if they can remain anonymous. Also rewarding voters can work too.