Vaalingrade
Legend
Not morally? Let's ignore stuff created by people you don't know that's entered popular culture.It's not stealing in any meaningful sense legally or morally. Right now I could design and run an adventure for my group where the PCs take on the roles of Doctor Doom, Doc Savage, Doctor Jones, Doctor McCoy, and Doctor Steel fighting against the World Crime League after they've kidnapped Buckaroo Bonzai and that's perfectly fine.
Someone who is in theory a friend you played D&D with says 'please don't use my creation' and the DM's like 'lol, no'?