This plant is known by Jimson Weed, Loco Weed, and the devil's trumpet. It is poisonous to humans, pets and livestock.
If it doesn't kill, it makes you mad for a few days.
The plant should be destroyed, if you find it living with you. Under no circumstances should it be added to stew (a family of six is said to have been hospitalized after eating said stew.) Too bad it is so poisonous; it is really beautiful.