A compelling thought-experiment at the end. Yeah, you could say these things are a tad small.
KATRIN* Cuts the Mass Estimate for the Elusive Neutrino in Half
Phys.org | 09/16/2019 | James Urton, University of WashingtonNeutrinos are abundant. They are one of the most common fundamental particles in our universe, second only to photons.
Yet neutrinos are also elusive. They are neutral particles with no charge and they interact with other matter only through the aptly named “weak interaction,” which means that opportunities to detect neutrinos and measure their mass are both rare and difficult.
“If you filled the solar system with lead out to fifty times beyond the orbit of Pluto, about half of the neutrinos emitted by the sun would still leave the solar system without interacting with that lead.”
*Karlsruhe Tritium Neutrino (KATRIN) project

These neutrino fellows sound entirely innocuous and inoffensive. A bit dull but harmless.
Why would you want to go sticking your nose into their business?
The neutrinos leave you alone, you should leave them alone. Everybody’s happy.
These scientists sound like the Stasi…or Google.
If measuring was really that important then no matter how difficult it might be it shouldn’t also be rare.
I was told I had a great time in Karlsruhe back in ’70. I don’t recall any Neutrinos or photons.
https://www.youtube.com/watch?v=Jm2MB14JTSM
Science! The thing she blinded me with.
https://www.youtube.com/watch?v=ZGItz8pEBLQ
Speculating here. Lead ball, 50 Pluto orbital diameters .Heavy sucker. Thinkin it would collapse into a black hole, kinda almost as fast as light could cross it, or at least before next Tuesday.
Nothin gets out of a black hole. So no Neutrinos would exit.