Remember that this 14% won't be coordinated, so you won't come ahead at all... there needs to be 14% more miners doing one side than the other. This is an useless exploit IMO - even worse than powerblock-only mining.
Well... if everyone does it pretty much everyone wins in terms of getting more for less. Alternatively if you represent 50% of the network hash rate, it allows you to mine more than double the amount of coin.
With the difficultly algorithm the way it is (as was explained on BTC-e earlier), for every amount you decrease it the increased return in coin is exponential. All it takes is one of the large scale miners currently doing tens or hundreds of gh/s of BTC to use the script as described and the whole SC2 network will be hijacked. I was writing the script earlier today but got snagged in some python bugginess; it shouldn't be too hard to implement though. Then all people need to do is mine together using the same script. To use the script makes more sense in terms of profit/watt, so it seems obvious that people would coordinate with it. As soon as someone does to a large extent it's likely others will follow.
How do you prevent half the people mining odd difficulty adjustments, and half mining even ones? People are stubborn. This won't ever work.
Why don't people coodinate to elect one party this election and the other the next? This will evidently be good for the people. Same thing with pressuring companies to improve: if 90% of people switched away from Windows, the next version of Windows is guarenteed to be awesome.