I believe that, in addition to the physical bulletin board, there are also a few (very dusty) computers with directories where you can leave notes for campmates and look for rideshares.
When he lights his streetlamp, it is as if he brought one more star to life, or one flower.
When he puts out his lamp, he sends the flower, or the star, to sleep.
That is a beautiful occupation.
- Le Petit Prince, Antoine de Saint-Exupéry