"Don't be evil" was one of the most successful pieces of feel good propaganda I've ever seen from any corporation. People still regularly quote it as "proof" that Google is an altruistic entity which only spies on you to "provide you with a better experience" and "change the world" (with "for the better" being implied).

It's amazing how easy it is to get the majority of people to completely shut down their critical thinking abilities. In this case, it only took 3 words.