Member of the United States Food Administration. Please Hang This Card In Your Front Window" poster
The pattern
This still is filed under Civilian war-duty equate.
Define
A civilian act (saving, making, staying quiet) is framed as the same duty as the front.
Mechanism
Moral equate. The small act inherits the gravity of the large one. The ask is ordinary. The meaning is not.
Verdict
We need mass compliance on an unglamorous behavior and can honestly tie it to a shared stake.
Why it works
Turns a private action into a public declaration. By providing a physical badge to display in a window, it leverages social pressure and neighborhood conformity to enforce compliance.
Steal this when
You want to drive adoption of a hidden or private behavior by giving participants a public way to signal their compliance to neighbors.