Wow, I remember most of those.
It's funny that I actually worked on two of the newer anti-weed psa's, considering that, at the time, I was one of the biggest stoners you would ever meet. Hell, at that point I was making weed-butter for one of the top-rated medical marijuana collectives in the San Fernando valley (which is where the "valley girl" accent originated). In fact, most of the people involved in the production were currently stoners, or had been at some point.
Since then, I've come to realize that weed just makes my asperger's worse, and I've quit smoking weed altogether (I even let my prescription lapse).
I'll never forget listening to my boss (who is an old hippy, who I've talked to about smoking alaskan thunder-f**k) tell the head of "Partnership for a Drug-Free America" that he really wouldn't be heart-broken if his kids decided to experiment with drugs.
Here are the psa's. (By the way, the face on the "flat" girl is actually a silicone copy of Winona Ryder's face, flattened and contorted.)
"Flat" girl: http://www.youtube.com/watch?v=SUxjI8BhJDk
"Smushed" girl: http://www.youtube.com/watch?v=wRiGD4VRIf0
Edit: I can't tell you how happy I was when I saw "Family Guy" do a spoof of "Flat" girl...
http://www.youtube.com/watch?v=f4FWQA1q1KU