Normative Signs: The Poetry of "Ought"

I love normative signs that use graphics to convey great danger. Drawing one of these must be the highlight of a sign artist’s day.

I assume that the graphics are a non-trivial part of the sign — that is, the sometimes-gruesome graphics are used for persuasive emphasis.

This sign, portraying grave physical danger, is posted near the gate of a pay-parking lot at a Toronto hospital.