This plant has a long history and it is mostly good.
http://www.askaprepper.com/similar-morphine-best-natural-painkiller-grows-backyard/Read the whole article and make your own decision...
I'm not recommending this or advising against it. In a PAW, this might be useful and also it is not something which will attract thieves to your garden. It could be grown in a fence row or scattered in random patterns. It looks like other common weeds.