I do think it's an issue and to be honest I'm not particularly impressed with Ghash's response, or lack there of.

Especially when you compare it to the quick and effective response of BTC Guild when they were in the 40% bracket.

Some people have speculated that Ghash has mining power that totals above 50% already but their mining it off pool in order to avoid attention. I'm not saying that's true, but if they did end up with over 50% of the hashing power that would seem like it would be the most rational thing to do economically speaking(if and only if the public had no knowledge of it happening).

>50% attacks are real and should be taken seriously by the community. Even the threat of one is enough to seriously harm bitcoin in the eyes of the public. I don't even want to imagine what sort spin these modern media companies would put on it.