You did successfully downvote my post (about dual-booting and dual-OS-VM's), which cancelled out the existing up-vote. What was wrong with it, can I ask? Did I say something incorrect?
Hey Moderators, I cannot downrate your posts but get downrated all the time by u?
As phantom said, at this current moment, your post on the previous page ("Ubuntu beats them all out of the water...") was down-voted by 3 users and up-voted by 1; none of those members were moderators.
Your post on this page ("there's much more than proprietary crap. Lots of silly people in this forum...") was down-voted by a different 2 users, neither of them moderators.
That's 5 people who aren't happy with the way in which you're expressing your opinions, none of them moderators. If you're being down-voted "all the time", that's an indication that the community as a whole (not necessarilly the moderators) thinks that either your attitude is unhelpful or your facts are wrong. If you would like to discuss hypothetical reasons why specific posts are unpopular, feel free to PM me.