There is so little criticism of the sorts of dangerous experiments that high energy physicists engage in, mainly because the ordinary people know so little about elementary particle physics and high energy collisions. However, the potential does exist to destroy not only the Earth, but by a chain reaction, the entire universe.
https://www.zerohedge.com/technology/meet-mad-scientists-performing-universe-breaking-experiments
“CERN is currently working on a lofty plan to revamp its “flagship accelerator complex” over the course of the next two decades. But a more powerful particle accelerator could be the very last thing the world needs, according to British cosmologist Martin Rees. Rees, a well-respected expert in his field, issued a grave warning to the scientific community about particle accelerator experiments gone awry in his book On The Future: Prospects for Humanity published late last year. These experiments meant to push the boundaries of nature and physics, he writes, “might do something far worse — destroy the Earth or even the entire universe.” As alarmist as it sounds, this is no crackpot notion. Rees writes that, "Maybe a black hole could form, and then suck in everything around it [...] The second scary possibility is that the quarks would reassemble themselves into compressed objects called strangelets. That in itself would be harmless. However, under some hypotheses a strangelet could, by contagion, convert anything else it encounters into a new form of matter, transforming the entire earth in a hyperdense sphere about one hundred metres across."
