Is there any possibility that CERN's Large Hadron Collider run 3 can be devastating?

Question

When I was a kid, there was a lot of discussion on electronic media channels that the run of CERN's Large Hadron Collider would lead to black holes. At that time, the president of India, APJ Abdul Kalam, said there were no chances for destruction. You can read his statements in the article Kalam allays fears of 'Dooms Day':

"It is just that the scientists in Geneva want to establish their own belief of the creation of universe as caused by the Big Bang," Kalam, a scientist, told reporters on the sidelines of a function at the Army Hospital here.

Narrating his personal experience when he visited the CERN site in Geneva recently, Kalam said it would not create any threat to the lives of the people, but would help in enhancing their living standards.

I came to know that there is a run three scheduled today. After run one has begun that time, people believe that destruction due to blackholes may happen after 10-15 years. And still, I can see some channels and users of online platforms say that there is the possibility of destruction after some fast-moving particle collision. Some of the viewers of CERN's channels also comment that there may be a possibility of destruction.

Is there any rational basis for such claims related to destruction? If yes, then what can happen in the worst case?

Answer 1

No.

There is no chance of catastrophic consequences of the CERN run. CERN Website LSAG report

The simplest evidence of this comes from the fact that nothing particularly special is happening in the LHC. The collision that the LHC generates under lab conditions happen regularly in the Earth's atmosphere when it is hit by high-energy cosmic rays.

In this sense, the LHC run is much safer than, say, the creation of the first Bose-Einstein condensates, which generated conditions that (for as far as we know) have never existed anywhere in the history of the universe.

For the specific "threat" of the creation of micro black holes, note:

1. According to the laws of nature as we currently understand them, it is impossible to form black holes at the LHC. Doing so would require a significant deviation from the known laws of physics (e.g., the existence of large extra dimensions).
2. Even if a micro black hole would be created, theory still predicts that they would almost instantly evaporate due to Hawking radiation.

So, for something to happen, our understanding of nature has to be wrong in very, very significant ways.

Of course, one can argue that one should not "gamble" the lives of billions of people based on what a bunch of theoreticians are saying.

For this, we return to the argument of cosmic rays. If the LHC is to produce black holes, then cosmic rays colliding with the Earth and other celestial bodies must also regularly produce micro black holes. Due to the high energy of cosmic rays, hypothetically stable black holes produced by them would also travel at high velocities, fast enough to escape the Earth. However, if this happens on Earth, it also happens on neutron stars, which would be dense enough to stop the created black hole. If this were to happen regularly, neutron stars would all be unstable and collapse to black holes in short amounts of time. The fact that we observe neutron stars that are stable over many decades tells us that this is not the case.