Recreational pharmaceuticals by genetic engineering

[Steve Schear]

I know this is off-topic for the list...

But why hasn't some cleaver graduate student engineered a common mold or
yeast to yield easily extracted (or directly ingestible) common
recreational pharmaceuticals?  Ideally it would be a perpetual source, like
sour dough starter, and easily cultured.  Once distributed to the street it
would be impossible to stop or track (since no controlled chemicals would
be required for production).

--$teve