From a reader who defied me:
Yes, I know, I know.
But Arkham Asylum is where they send the crazy people. Regular ol’ supervillains were sent to Belle Reve Federal Penitentiary (located in Rod’s Louisiana; it was the home of Task Force X/the Suicide Squad) before it was blown up. Now, they go “The Slab,” which I think is actually “Slabstone Federal Prison.”
I don’t write ‘em, I just read ‘em.