Democracy needs and can be improved by Negative Vote.  Voters should have the option to vote NO instead of YES.  The NO vote will be counted as minus one.  Winner is the person who gets higher net positive votes.  Each voter still has only one vote.  This will increase voter participation and can alter the outcome in a tight contest.  This will also reduce the influence of extremist candidates.  
www.facebook.com/NegativeVoteInternational/