More seriously, closed-end funds trade at a premium/discount to their assets, and this premium/discount is an estimation of the NPV of out/underperformance. So it's not cut-and-dried like with an open-end fund that you're going to do well by shorting it. You will find arbitrage relationships, I'm sure... But not like with open-end funds, and I doubt you'll make much in the way of risk and transaction adjusted profits if you short arbitrarily.
-But-
Incognitus, you do come up with interesting ideas.