I always wonder if people really are so delusional that they actually believe Slashdot has and merits this kind of value and attention (big companies bothering to pay people to post here?? yeah, right..), or if it is just an easy way of dismissing dissenting views.
It's not a question of dissenting views, the fact is that there has been a recent pattern of brand-new users jumping in at the top of the thread and praising Microsoft or some similar entity. The most blatant ones were the Visual Studio spam, but there have been a lot of similar ones. Now I suppose it might just be a particularly dedicated troll, but it has to be said, it looked a hell of a lot like a fairly clever PR drive - I probably wouldn't have noticed had it been done more sparingly, it was the fact that there were so many of them that made them look suspicious.
The other thing is that you're arguing that Slashdot is being singled out. If I were trying to seed opinion I'd cover a range of them. Personally, I only regularly check Slashdot and the Reg to get my tech news fix so I'm not in a position to comment.