Including the standard upvotes and karma system in
reddit, digg, and slashdot, which determins herd
popularity; there should also be a seperate system for
discussing on the quality of the comment.
So far most meta comments and votes are merged into
normal popularity contest of karma, where
subjected to the same bias of groupthink at the time.
By having a meta comments system (like in stack
overflow) and a seperate 'meta' voting system, a
seperate meta-karma system can be performed. A post
or a commenter with bad meta karma score will not have
their 'comments' hidden, but it will be marked with a
warning tag to be 'skeptical'.
This meta-karma system should not be used on a whim as
another way to downvote people you don't like, voting up
or down must be done with a meta comment on why it
was done. Also an army of certified grammar, and meta-
comment nazis will be there to ensure that the meta
comments are to a certain quality standard.