Sorry, I don't buy it. Biologists at large may have "enabled" biological (not chemical, that's chemists) warfare by learning about biology and contributing to humanity's understanding of it, but it was only specific biologists who actively created biological weapons, and only those biologists should be held accountable (and they should).
Mathematicians at large may have enabled various terrible things again by contributing to our knowledge of math, but those mathematicians are blameless; only the ones who used their knowledge to (insert bad thing here) are the ones who can be blamed.
Doing research that can be later used for good or evil is generally fine. To say that improving our understanding of biology is a bad thing is clearly ridiculous. However, actively contributing to a biological weapons program is a very different matter.
For a hosting service, that's much more like active contribution than simply providing knowledge. The people who wrote the Linux kernel are akin to the biologists who simply increased our understanding of biology, but people who manage a hosting service with actual customers are not like this: they have the power to decide who is using the service for actual evil, and the ability to refuse their business.
Biologists enabled chemical warfare. Same harm has been done with mathematics. Physics.
I think we largely let researches do research, and don’t hold researchers accountable for harm enabled with that research.
In other words, self policing of customers seems like a newer and uncommon phenomenon.