When all this legally grown crap first started up, well... I ain’t gloating but I had more than a few “discussions” with some dunderheads on FR who actually thought these incidents wouldn’t accompany the large scale production of MJ.
It happens in opium fields, it happened during the prohabition, and it’s happening with cannabis production. The criminal element ALWAYS gets involved.
Anything of value is subject to theft - and laws restricting the number of grow licenses artificially inflate the value of marijuana. As usual, government restrictions are the problem.