I recently found myself with the time to discover this place. Not bad for killing a few hours.
Anyway, I haven't read the other seven pages in this thread, so I don't know if these have been linked yet. Apologies if they have:
"People start pollution. People can stop it." - If you're over 30, you're sure to have seen this PSA. If you're in your 20s, you might have. Subtle as a slap upside the head, but necessary for its time.
Public Schoolhouse Rock (MadTV):
Nouns
Dysfunction Junction
Substitute Teacher
Pretty good stuff, but then again I did go to public schools.