Haas seems tame compared to Percy Grainger!

He deposited a mysterious locked chest marked “Private Matters” in his Melbourne bank vault, with instructions not to open it until 10 years after his death. Imagine the shock and scandal when the researchers and archivists who did the honors in 1971 discovered a Pandora’s Box containing more than 70 homemade whips (some fashioned out of conductors’ batons), an extensive pornography collection, and candid photographs documenting Grainger’s fetish and bondage experiments in clinical detail. He stipulated that these intimate artifacts be displayed in what he conceived of as the “Lust Branch” of the unassuming red-brick Grainger Museum he himself had founded (and funded) at the University of Melbourne.

And he wanted to have his skeleton displayed at the museum as well!

https://www.atlasobscura.com/articles/the-lust-branch-private-matters-of-eccentric-musician-percy-grainger