You're just too young.  During the early 70s it was a "fad".  "Streaking is the act of running naked through a public place as a prank, dare or an act of protest. It is often associated with sporting events but can occur in more secluded areas. It usually involves running quickly which also reflects the original meaning of the word before it became associated with nudity."  It was generally pretty harmless and good for a few laughs.....However, I was just a spectator...not a participant.  regards, Gary