Ya they can get warrants on whats in your trash no doubt I have seen it happen which is why if you grow a fireplace is vital in my opinion. Then again a steel drum is fine also to burn all your burnable trash. I dont throw out paper myself it all goes in the fireplace. The choppers really only can sense heat coming out of vents anyways. No need to really worry you can tell people you love pot just dont mention you got 1000 plants in your basement.