What was so abnormal about the needlecraft craze of the 70's? Why do we stare in amazement at the unholy hand weaved creations from this decade? Let me condense it all down for you in one sentence:
In the 1970's, they knitted things that weren't meant to be knitted.
It's as simple as that. If you want to make your own sweater, scarf, or baby booties - go right ahead. But in the 70's it didn't stop there. They made dresses, vests, toilet seat covers, and bathing suits (!) out of freaking yarn! For more direction on where to draw the line, see the What Not to Crochet blog.
Here's a few examples. Enjoy!