Led Zeppelin is broadly considered a forerunner of the heavy metal genre. [A bit of history of Led Zeppelin]
Led Zeppelin's ties to Francois Rabelais through Aleister Crowley.
Led Zeppelin's debauchery.
This page should generally outline who Led Zeppelin is, their relevance to the topic, and how they influence the development of disrespectable culture, while providing some cautions about this not being a compendium about them as a central topic.
Davis, Stephen. 1985. Hammer of the Gods. Ballantine Books:New York. 0-345-33516-3.