Also interesting that in Australia, which has mandatory voting and ranked ballots, that 1 in 5 people eligible to vote doesn't make their vote count anyway, either by paying the fine and not voting, or by spoiling the ballot (informal voting). This does not include 'donkey voting' (marking 1-2-3-4-5 from top), which some have estimated to be as high as another 5% of ballots cast, which actually count.
That doesn't seem like a great answer.
http://www.news.com.au/national/one-...-1226695607576