I think Linca is talking about the possibility that the LHC's quark-gluon plasma creates a microscopic black hole which would then proceed to eat the Earth.

Can the last politician to go out the revolving door please turn the lights off?

Larry Niven wrote a very funny story about the black hole that ate (will eat) Mars.  

You do not want a black hole anywhere near your neighborhood.  Or even near your planetary system.  This is the kind of thing that ought to be obvious.  It matters not at all what you might be thinking to do with it.  

Scientists who refuse to think about consequences really bug me.  There are words for people like that, but no polite ones.  

PS I DO know the difference between fusion and fission, but unless a technology like Inertial Electrostatic Confinement can 1) get funding 2) actually work, we have missed the window on that one because even if ITER/tokamak finally works it will come too late.  And we STILL would need to consider what to do about the hot fusor site itself.  

The Fates are kind.