But seriously: what's the point? Any information Claude can offer about i.e. the synthesis of sarin[0] is public information, which Anthropic scraped from any number of public websites, public search engines, libraries, books, research periodicals.
This is a novel cultural norm, so it should be interrogated: why should we make it become normal, now, to censor college chemistry questions? Why is this the normative, "this is how we must do things" in elite California tech circles? Google doesn't refuse chemistry queries; are they in the wrong? (Should search engines agree to start censoring themselves to align with LLM censorship conventions?) Is Wikipedia also in the wrong, that they host unsafe, harmful chemistry knowledge? What about SciHub? What about all the countless independent websites storing this (elementary, 1930's-era) harmful technical information—should we start doing DNS blocks, should we start seizing web servers, how are we to harmonize internet safety policy in a consistent way?
Because if your position is "we need to scrub Harmful Responses from the internet", you can't just leave it at LLM's and stop there. You need to have some plan to go all the way, or else you're doing something silly.
https://en.wikipedia.org/wiki/Sarin#Production_and_structure
(Tangential thought: assigning chemical weapons synthesis problems on exams would be a clever way for chemistry professors, at this moment, to weed out LLM cheaters from their course).