PSA Memes: Unlike most other parody memes based on public service announcements, this highly subversive publicity stunt was conceived as a faux advertising campaign for Shell Oil Company from the beginning.

PSA Memes: Despite its good intention to encourage youths to use proper greetings, this happy and upbeat public service announcement stirred a controversy in Japan after it was broadcast during the emergency TV programming after the Tōhoku earthquake and tsunami in March 2011.

PSA Memes: This educational webcomic project to inform the youth about laws and good citizenship is an early example of PSA campaigns gone viral on the Internet.

PSA Memes: Earlier this year, a patronizing ad campaign launched by Queensland's commuter rail service inspired a series of parody posters featuring hilarious copies revised by Redditors.

PSA Memes: This campaign, designed by a group of volunteers, helped Wikipedia raise $16 million in November and December 2010.