FWIW: In the first issue of Kevin Smith’s Batman: Cacophony, on stands this week, Deadshot finds the Joker reading a copy of The Fountainhead. Joker finds it boring, while Deadshot says it’s one of his favourites.
Moral: contract killers like Ayn Rand more than psychopathic clowns do. I guess that makes sense, actually. Still, you’d think the Joker would at least appreciate the first line.