You've probably heard of the atheist bus campaign. By now, banners proclaiming things like "There's probably no God - So stop worrying and enjoy your life" have appeared on buses in cities all over the world.
Sometimes though, atheists and humanists have had trouble getting their campaigns started. Bus companies are often afraid of controversy or just don't like the message. The Humanist Society of Santa Barbara seems to be having this kind of trouble with their local Metropolitan Transit District.