There are plenty of things about MongoDB I don't like but this OP is a total coward. If you've got something to say, put your name on it and come out in the open.
This type of post is the worst of its "hiding behind Internet anonymity" kind.
And for the record, I don't think Oracle is behind this. They're confident in their Exadata offering and have little to gain by posting this kind of crap around MongoDB. Besides, Larry Ellison has never been afraid to openly taunt his competitors.
The thing that worries me most is that this article got so many upvotes.