I suspect that others downvote private_messaging because of his notoriety. I did downvote his comment because he strayed away from my explicit (estimate the complexity of the Newton's 2nd law) request and toward a flogged-to-death topic of MWI vs the world. Such a discussion has proven to be unproductive time and again in this forum.

Likewise. (With the caveat that I endorse downvoting extreme cases based on notoriety so probably would have downvoted anyway.)