In the late 70s, when C-3PO and R2-D2 were taking a break from helping the Rebel Alliance fight off the Galactic Empire, they were assisting in bringing awareness to some of the issues that normal Earthlings face.
In this PSA from a galaxy far far away, R2 is sneakingly puffing away on a cigarette in the corner of the control room, when he is caught by 3PO. 3P0 scolds R2 saying smoking is very bad for the lungs and even though they don’t have them, they should set a good example for the humans.
http://www.youtube.com/watch?v=YWQgktBR6-w
See the two remaining PSAs after the jump.
In this PSA, R2 worries about contracting “whooping cough”. R2 allays his chum’s fears but informs Earth parents to ensure their children are properly immunized.
In this late 70s PSA for the U.S. Department of Transportation’s “Friends don’t let friends drive drunk” campaign, a patron at the Mos Eisley Cantina is a little too refreshed to fly home and gets a little help from his friends.
http://www.youtube.com/watch?v=MsSIpDK16c4
[via Scott Beale on Google+]