> This just dropped by -4 in a ten second span (edit: moments after another -4), essentially confirming the suspicion.

If I made a comment along the lines of "I think the HN moderators hire hitmen to kill commenters they don't like," that would probably get downvoted very quickly and very harshly. This would not be proof that the moderators put hits on commenters — it just shows that baseless conspiracy theories are not very popular here.