Come on now. This is common knowledge and you can easily research it yourself. What you're doing right now is the moral equivalent of saying "nobody has shown me evidence that germs exist" on a COVID-19 thread.
in fact, they actually do do this, don't they? Quite a lot of COVID-19 deniers demanded proof of "isolation" i.e. they demanded someone to show them a vial of pure COVID-19 virus and then somehow prove that's really what's in the vial. And they demanded proof of "Koch's postulates" i.e. that injecting people with the stuff in the vial gives them COVID-19, etc etc.
e.g. this FOIA request: https://www.ons.gov.uk/aboutus/transparencyandgovernance/fre...
Whenever Kiwi Farms comes up, I see these claims made about it - that people were threatened with violence, that the forum was used to coordinate harassment campaigns, that home addresses were posted, etc etc - but never with any specific examples shown of any of that happening.