A book mark would be better!" poster
The pattern
This still is filed under Public health warning.
Define
A warning designed to change a health behavior (stop, screen, stay home), not to sell a brand.
Mechanism
Fear with a next step. The threat is specific. The action is doable today. Fear without an action is cruelty.
Verdict
The risk is real and the action is clear. Official or civic voices help.
Why it works
It uses playful, exaggerated humor (ironing a book page) to correct a common bad habit without being overly scolding or authoritative.
Steal this when
You want to correct user behavior in a friendly, non-authoritarian way by using a humorous exaggeration of the problem or fix.