Only allow a node to be voted on if the voter has published a reply to the node in question.

Most of my votes are spent in the following fashion (in no particular order):

• When one or more person posts what would have been my answer had I been there earlier, I upvote them.
• When someone's reply is better than mine, I upvote it.
• When someone's reply is so perfect that any other replies in the thread should be deleted, I upvote it. Grandfather had a few of these last night.
• I often upvote people replying to my own nodes, especially if they point out a problem with my node.

In none of the above situations do I reply to the node on which I voted. I'd be more likely to update any replies I might have in that thread.

I object, since I don't want to discourage (not encourage) "me too!" posts.