Probably half the plants in existence are toxic in some form, at some stage, or in certain amounts. Education (esp of children) and awareness is more important than eradication.

North American plants that are toxic to some degree by contact:

* Bull Nettle (Cnidoscolus stimulosus)
* Blue-green Algae (in water) (Cyanophyta)
* Wood Nettle (Laportea canadensis)
* Black Poison Wood (Metopium toxiferum)
* Poison Ivy, Poison Oak, Poison Sumac (Toxicodendron species)
* Stinging Nettle (Urtica dioica)

Our world is not a safe place, so people should get used to it. Why, even the PEOPLE are dangerous!