If you were 20 in 1970, why would you have participated in the youth or counter culture movement, or why would you have refrained from either?
It is, of course, impossible to know what I would have done. If I had been born in 1950 instead of in 1970, when I was actually born, my upbringing would have been very different. I would likely have had different attitudes. Simply going by my own life, I believe that I would not have been part of the counterculture.
The reason for this is that I believe that people should act in ways that are good for society, not in ways that are simply attractive to them. My feeling about the counterculture is that it was a somewhat self-centered movement that was largely about people who wanted to behave however they liked, regardless of social convention. I feel that this sort of behavior is somewhat self-indulgent and I do not think I would have participated.
Again, though, I grew up in very different circumstances than someone born in 1950. Therefore, I cannot know what my attitudes would have been if, for example, I had been a teen during the Civil Rights Movement and the Vietnam War.