<p>While it is an interesting suggestion (with which I have some misgivings), I think this is a solution in search of a problem that isn't there.  One thing that is worth bearing in mind here is that there is already a species of <em>de facto</em> weighting, from the empirical fact that users with higher reputation use the site more often/consistently and therefore cast more votes.  For example, at the time of writing this post, <a href="https://stats.stackexchange.com/users/919/">our highest reputation user</a> is listed as having cast 32,216 votes on CV.SE and another 1,433 votes on CV.SE.meta.  (Using the simplifying assumption of 10 points per vote, that is 336,490 score contributed by that user.)</p>
<p>Consequently, while an individual vote from a high reputation user is treated as giving the same score as an individual vote from a low reputation user, high reputation users have generally contributed far more score to questions/answers merely from higher numbers of votes cast, which follows from their generally higher level of participation on the site.</p>
