They may not exactly have the greatest reputation in the community, but you have to be pretty smart to run your own large-scale hydroponic cannabis operation while avoiding the attention of the authorities.

There’s a lot of science involved, a lot of misdirection, and you have to be fully aware of the sort of tell-tale clues that police pick up on when looking for drug factories.
Richard Edmunds and his flatmate Joshua Langmead, both aerospace engineers, had been doing a pretty good job of staying a step ahead of the law with their own operation – two bedrooms that had been converted into mini-cannabis factories, complete with growing lights and fans. Sadly for the duo, Richard made one tiny slip that helped police crack the case – he took a photo of himself in front of the cannabis plants, smiling and giving a thumbs up, and sent it to all his mates.
Police were then tipped off about the photo and swooped on the house in South Molton, Devon. The two men, both aged 25, have both admitted to supplying cannabis at Exeter Crown Court. Idiots.