What's funny is that when I was growing poppies in my garage, I'm sure my nosy neighbors thought I was growing marijuana. Light was emanating from underneath my garage door at night and i was getting dirty looks from my neighbors.
But growing marijuana is legal in my state. Yet what i was actually growing in my garage (poppies)
was illegal

.
But give how obscure it is, I can't imagine anyone thinking, "he's probably growing opium in there".
Had someone found out and out called the cops, I'm sure they would have made a big deal over it over a few plants. "$10 million dollar opium poppy growing operation found in man's garage".
I actually had a couple plants growing in my backyard at one point, which made me nervous because my next door neighbor is middle eastern and I was worried that out of anyone, he could recognize the plant.