Then I strongly advise you change your wording. Without specifically saying it's a warning to future theoretical comments, phrases like 'the usual "hacker news learns about chemistry" disclaimer' and 'You can't just say "oh, it contains cadmium", and assume that it's bad.' come across as direct and harsh counterarguments.
FWIW, it did not came across to me that way. But in the intended way. Maybe a little bit condescending, but still informative, without me feeling negativly insulted as someone knowing way more about computer than chemistry.
