I used to own The Tao of Jeet Kune Do by Bruce Lee. The only controversial thing he did was buy a shit load of Narcotics. Currently the closest thing to controversial I have is the complete works of H.P. Lovecraft, due to his racism. As well as one of the original copies of Stephen King's It. The one that depicted the Loser's Club having a mass orgy after fighting Pennywise the first time.
SolidSnakeOnAPlane
What’s the most controversial thing you own? Please let me know in the comments below.