I don't disagree, but I'd say there's not really a big problem with people or kids trying to eat flowers. Foxglove and solomon's seal are dangerous but they also don't grow where I'm at. Lilies and morning glory do grow here, and they are also not terribly dangerous to humans (without eating a lot of them.)

Where I'm at, particularly in the suburbs, there's a distinct lack of things that are tempting to eat (like a berry) and also poisonous.