Here we see a tired Smokey Bear holding a message: Please Prevent Forest Fires.
Although that one and the famous "Only YOU Can Prevent Forest Fires" are direct appeals to everyone who sees the poster, the first Smokey Bear poster had a different message. It said "Care WILL prevent 9 out of 10 woods fires!"
Notice the differences. It's not a personal appeal, and instead of saying "forest fires," it calls them "woods fires."