You could also go back to late 2008...naked shorting was widely believed to be a major contributing factor to the demise of Lehman Brothers. It also prompted the SEC to temporarily restrict ALL short selling of 19 financial institutions deemed systematically important.
Not that shorting is a bad thing. When you actually procure a borrow, it can increase efficiency in a market by providing liquidity. But if you go short without a borrow, it creates dilution, plain and simple.
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