@ All
well, i´m not Evildave ( btw, hope he´s doing fine ) , but maybe as a college student who got an A in his physics class i might be able to help
first , to be fair, i should tell you that i´m not a particel physicist. I study enviromental engineering, focusing on Air chemistry and pollution. Only someone who has graduated in this field and has at least some years of experience, can give you a complete and valid answer. But everyone who knows at least a bit about physics will tell you that all this doomsday stuff is mumbo jumbo. Nuts. In fact there´s a higher probability that the machine will spawn a living dragon.
Thus said, relaxe and stop listening to all those crazy people , who don´t even have a college education, but thanks to the internet can share their opinoion with everyone. I have followed this whole topic for quite some time now and was amazed from where this whole black theory came.: Some guy who sais he has a degree as a philospoher of science and claims he found the theory of everything.
WOW ,i tell you i was strucked. Some guy without proper college education and a weird title had found a theory, that real scintist are searching for since Einstein discovered relativity in 1905.
But i was even more strucked by the paper he had published on his webpage. Not only showed a complete lack of understanding of basic physics , he also has no experimental data to prove his conclusions - which is a real handicap, since natural science needs experiments that can be reproduced to prove a theory.
So what are these guys going to do ?
Nothing that isn´t done dozens of times every week in several labs. They will accelerate particles and hope that some of them will collide. Since Einstein teaches us that matter and energy are the same (E=mc^2), this particles will hit each other with a huge mass and the \"Explosion \" will produce all kind of particles. IF it works and the theory is right they will produce so called \"Higgs Boson\" particles. The bottom line is, that with these particles we could finally understand how mass is \"made\" and why some particles weight nothing at all.
The critcs claim that \" the energy is big enough to produce a black hole ( rememember a black hole means so much mass in one point of space that it sucks in even the light, because th escape velocity is higher than the speed of light ) that will grow and ultimately suck in the earth.
Theyre scenario goes on by saing \"that this will be the result of a \"head to head impact \"of two particles with giant masses\"
So let´s examine these claims
1. Do you really think that the european electricity network can generate enough power to destroy the world ? i mean seriously ask an engineer of one of the big elecricity companies if they can produce enough energy to create so much mass with a collider that a black hole is created. But give me call first, cause i wanna be there to see his/her face lol
2. The critics talk about \"head to head collisons\". Sure

.
Imagine you got 2 men with shot guns , standing face to face with each other , pulling the trigger at exactly the same time. Now, how big do you think are the odds that two grains will hit each other EXACTLY in the middle and how many will just pass each other ? Now multiply that wit 10 million and you know the odds for thsi omnious head to head impact. head to head my ass.
3. The energy produced by this is not bigger than the energy of a mosquito landing on a window
4. Impacts like this happen all the time in the upper layers of the atmosphere. So far this didn´t produce any black holes, but hey it´s been only 5 billion years with hundreds of thousand of impacts per day.
5. Even if all dark powers of the universe are against us ( to quote Terry Pratchett : \"thunder rolled. It rolled a 6 \"), and a black hole is created, it will be unimaginable tiny. So tiny in fact that it will vaporize, because this is what black holes everywhere in the universe do. they loose weight through the so called hawkings radiation ( rather complicated, would take to long to explain it here ). usually this vapourizing and shrinking takes billions of years, because of the huge masses we´re looking at , but since our unlikely black hole is so itsy bitsy tiny, it would only be a matter of milliseconds.
So stop worrying , paint your miniatures, leave your kids in school and don´t cancel any play dates. Unless of course you think a meteorite will kill us all in the next days, which ids much more likely and should be a concern to every upright citizen.