Re: Please stop with the "Growing plants" thing
"If I wanted to produce enough opium for personal consumption i'd need acres and acres of poppies, not four or five plants in a loft/shed/garage."
You would be surprised.
The people growing acres, are the ones in Afghanistan going for industrial production. A patch of poppies in your garden would make enough opium to get you very, very high for quite a while. Or dead. Opium's a bit more dangerous than marijuana's 1:40,000 high-to-dead ratio. Rather more addictive, too.
(Alcohol is something like 1:6 to 1:10 for high-to-alcohol-poisoning depending on your constitution)