Normative Signs: The Poetry of "Ought"

This sign says “Do not step on the flowers!!!”, and was spotted in Kyoto.

It wouldn’t be noteworthy were it not for the fact that it is posted above flowers that are relatively difficult to step on in the first place, given that they’re in a raised flower bed (see photo below for context). As always, this one makes me wonder just what the story is. What pattern of balance-beam flower-stomping made this sign necessary? And is someone who is hell-bent on climbing up onto a planter really likely to read and obey such a sign?

Interesting also that the triple exclamation marks suggest a certain degree of urgency.

Thanks to Johan Portström for submitting the photos.