The War Advertising Council's "Loose Lips
Sink Ships" public service ads reminding Americans of
the dangers of revealing too much information are still remembered
today. This particular campaign encouraged Americans to be
discreet in their communication to prevent restricted information
from being leaked to the enemy during World War II.
The theme was widely promoted in advertising
as well as through other informational channels. The War Advertising
Council prepared a guide for advertisers, which included posters,
radio spots, and promotional kits for use by local security
committees. Even relevant product tie-ins were encouraged,
resulting in a leading manufacturer's admonition to those
in on military secrets to "Keep it under your Stetson."
Research conducted by the Council in conjunction
with the campaign indicated that twice as many of the people
exposed to the careless talk messages were aware of what information
could not be safely discussed in wartime than those not reached
by the campaign.