Of course ghash.io would do something about it. Like any mining pool would want to bring down the network, their source of massive income ........
Still we couldn't just count on the good will of the mega pool like we did every time in the past(Deepbit, BTC Guild...), it's intriguing why miners keep flocking to the biggest pool and whether something could be done about it.
They need some stiff competition .... I agree having one massive pool isn't a good idea. Other people need to step up and run a decent service with low fees.