That said, the real story behind the hype does sound plausible, and stuff like that just highlights how absurd the notion of "efficient free markets" really is. You need transparency, you need regulation, and most importantly you need prosecution.
This is a simplistic reading of the reasons for the market crash; it is a complex system, which had multiple fail safes, as well multiple attacks (legislative weaknesses, absurd leverage levels, bad risk distribution) which led to the quagmire we are in today.
If the title limited itself to "possible bear raid on Citi Stock in November 2007" it would still have some legs. Going on to postulate that this precipitated the crisis (and the unsaid subtext being - perhaps without this the market wouldn't have crashed like it did)
Further, bears will short a stock which looks likely to be weak, and there is also a buyer on the other side of the fence. A link to the originally article may have been more worthwhile.