Voting and/or Rating Threads

I think you missed something in my original post -

As far as voting multiple times - No. The ability to go back and change your vote, yes.

I say that because I think that it gives a fairer representation as to the quality of the thread. For example - suppose this thread got ranked a "1" because someone thought it sucked. But it turned out to be a great discussion, so they vote it a "5". Now their median is "3", aka - "alright, but don't waste your time on it if there's a 4 or a 5 around". This makes it harder for the ratings to actually change on a thread. However, if the person can change their vote, more weight is given to that one vote. Now their median is a 5, because that's their only vote. Coupled with the other votes, we see what the actual rating is.

I agree that the rating of a thread should change as the thread does, but I don't agree that each person should be able to vote multiple times. It makes it more difficult for the thread to change "positions", if you will - therefore, a thread that got marked initially as a "1" might turn into a great conversation but only be represented by a "3".