Guards are being shown taking lessons on how to fall asleep just within reach of the bars with their keys dangling on their belts.
Zig Zagged: He escapes, only for it to be a virtual reality, only to escape from the virtual reality, only for it to be another layer of virtual reality, only to escape from the virtual reality, only for it to be another layer of virtual reality. He escapes it again, finally ending up in reality, only to discover that he's actually in an inescapable prison. Until he finds a flaw in that prison's security and escapes it, only to discover that it's actually a virtual world after all.
Averted: Either Black Jack avoids getting sent to prison or this is how Black Jack gets Put on a Bus.
Defied: Normally, every episode ends with some member of the Rogues Gallery going to prison. But Black Jack is considered such a threat that the heroes break with their normal adherence to Thou Shalt Not Kill, knowing that if they turned him over to the police he'd just escape.
Discussed: "You'd think the government would strengthen prison security by now..."
Conversed: "Oh, look, Black Jack escaped from yet another maximum security prison. Sometimes I wish they'd just let him get away for a change of pace."
The death penalty skyrockets because the prisons are just not able to contain these people and confidence in them plummets.
Alternatively: No one is afraid to end up in jail because they know they can just waltz out any time, and so the crime rates becomes extremely high.
Black Jack escapes the death penalty by pleading insanity, being sent to an insane asylum, and pretending to reform until he's released.