I am not sure I support downvoting of links. Though I am intrigued whether allowing downvoting for a set of users with some higher criteria than upvoting (say a

I am not sure I support downvoting of links. Though I am intrigued whether allowing downvoting for a set of users with some higher criteria than upvoting (say account date > 1 year + 500/1000 karma) will have some positive results.