The thread I linked to discusses pressing tablets. For a pill press you need a license in many countries and possessing a pill press without a license is illegal. So that thread is against the BLUA?
I am 100% certain that CWE is illegal and seen as producing illegal drugs from legal medicines by the INCB and therefore by all UN countries.
I do not see a difference between CWE, (illegal) cannabinoid blend mixing, synthesis and cultivation of controlled substances. Its all illegal activity with the aim to produce controlled substance. Mostly in volumes high enough that distribution and drug sales are an inevitable result of the forum posts. So in this respect I the BLUA does not describe what is and what is not allowed.
It seems to me that the text that alasdair quotes would mean that any form of controlled drug production is not allowed in forum discussion. But it seems not to be the case.