If you share an honest opinion that the average slashdotter agrees on it's instant karma, if they don't like it (even if the post is perfectly motivated and well written) you will get modded down. Kind of sad... The modding system isn't there to promote your agenda, it's there to promote the insightful discussions Slashdot is known for!
In my opinion, Slashdot cannot lay claim to promoting insightful discussions anymore, at least as far as anything Sony is concerned. Over here, most /. folks are willing to believe ANYTHING negative about Sony, even if it's from the worst sort of tabloid, and are unwilling to do the slightest bit of research if said research will work to disprove their bias against Sony.
Over here, anything anti-Sony, even if it's a blatant example of trolling = modded > +2,3,4 or 5 Insightful, Interesting or Informative, while anything NOT anti-Sony = modded 0, -1 Troll or Flamebait.
Says a lot about the maturity of the moderators here.