Ok, maybe I'm a Johnny-come-lately, but I've just now discovered this. Atheists are leaving generous tips at restaurants, and then a note at the end of the receipt stating something like, "I don't believe in God, I believe in your good service" or "I'm an Atheist, so I'm a good tipper.  Thanks for the great service!" Often the person will take a picture of the receipt and post it on Facebook.  I…