Hopefully someone will clear this up for me.
1. The CoS as you've noted does not condone illegal activity of any
2. No one in the CoS endorses or encourages
using legal substances that can harm you. But because they are
legal, they are not in the same category as harmful things that are also illegal
Satanists may legally indulge in whatever they like, but they know full well that they and only they will be expected to bear the burden of whatever negative consequences ensue, and know damn well not to expect automatic sympathy from other Satanists for suffering the consequences of stupid choices made over a lifetime, like lung cancer or cirrhosis of the liver.
This subject is covered in (absurdist ad nauseum) detail in accessible places on this message board, but you apparently didn't bother researching this more before posting.