You can try, but a lot of people have already thought of that.
As a result, there is essentially no stock available to be shorted (it's limited by the publicly traded shares that holders are willing to "lend"). But, the number of shorted shares was still almost three times the average daily volume:
http://www.viwes.com/invest/shorts/query.cgi?q=scox
Note that the last entry is dated September, 2003. Apparently, NASDAQ stopped providing the info for free, so this particular website is no longer updating it.
There's some evidence that the significant short interest is actually pushing up the price -- it's called a "short squeeze":