Actually, the LHC is probably not the accelerator you're thinking of here. Rather, the fears you're expressing (black holes, etc) were of concern to some with respect to the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Lab. For an overview here's the Wiki page. It discusses the black hole fears and how these were, and are, unfounded. For those who want a more technical side here is RHIC's website. There's a couple of links on it to black hole formation.
As to your concerns about Hawking radiation, might I respectfully suggest that it's a misunderstanding on your part rather than a mistake by Hawking. Without seeing the exact quote you're referring to I can't venture on a further explanation. Keep reading, and please ask again should questions come up.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind." - William Thompson, 1st Baron Lord Kelvin
"If it was so, it might be, and if it were so, it would be, but as it isn't, it ain't. That's logic!" - Tweedledee
This isn't right. This isn't even wrong. - Wolfgang Pauli