Why would you put yourself at risk by stealing power when there is nothing to hide. If I were growing (which i'm not) I wouldn't have any reason to hide anything if it was legal, I definately wouldn't want to go to jail for stealing power if marajuana was legal. I just don't think that stealing power is the issue. The reason they steal power is not to save money but to keep from having astronomical power bills thereby giving away their growing operation.
You make a logical, sane argument. But the people in question aren't the most honest of citizens to begin with, are they? 'Criminals' is probably a good description.
Just my opinion, but I don't think think they'd come clean. It's still lots of $ for the operation they're running.