The Yippies were a counter-cultural group from the US-Vietnam war era, and were famously prosecuted by the state as part of the Chicago Seven after experiencing a police riot during the protest against the 1968 Democratic National Convention in Chicago.
Catchy manifesto, perhaps, but the Yippies historically (to the extent there even was such a group) were the absolute pinnacle of spectacle for its own sake. They got nothing done, and ultimately served only to hurt the public image of the legitimate countercultural movements in the long term. I think it seriously goes against the more pragmatic and action-oriented outlook of Solarpunk to take cues from these guys.
The Yippies had a huge historical impact, one that deserves re-examination as another Chicago DNC approaches.