Yea that stuff..It's supposedly in Alfalfa naturally, you just have to brew it out.
Regardless of whats in it us as humans consume a gambit of unhealthy stuff in our existence. You don't think vegetables have some crazy shit in them to get them to grow huge or ward off pests. Im not saying that I would toss a bunch of toxic waste into my garden but if there is a possibility that I can make a plant that doesn't have a high resin gene more resinous then I think it's not so crazy to give it a shot. Also can't you get all sorts of sick using organics anyways given you use feces from a sick animal to feed your plants?
Just food for thought. Not trying to start a war or step on anyones toes. just saying there isn't always a organic substitute for everything and if there is it doesn't perform as well as some chemicals made to get certain results