I think I saw the same program.
Veteran SF cop describing wide-eyed teenagers arriving on Greyhound busses from Iowa or Ohio. On the walk from the terminal to Haight-Ashbury the local thug population would rob them/rape them/pick them clean.
I think the Summer of Love and the rest of the Baby Boom phenomenon was a delayed reaction, or consequence, of WWII, of total war, as waged by our culture.
The entire hippy phenomenon, the Sixties, and everything else we saw, was largely the result of massive, sudden, extreme change in society caused mainly by very rapid technology advances, that were a result of war-waging by advanced, very wealthy, very powerful American civilization.
Looking back on it, my impression is of a massive "whip-saw" action, with millions of very young, naïve, idealistic young people migrating to coastal cities, and in turn attracting the attention of tens of thousands of very rough customers who (as you said) robbed and raped them, and generally picked them clean.
Of course, that happened only to a relative minority of the young migrants, but the horrific individual cases caused an echo effect that still goes on today.
I was watching a documentary about Brenda Ann Spencer, of "I Don't Like Mondays" fame, who in 1979 invented the concept of school shooting massacres. She was only five years old when the Summer of Love happened.