system
Given the following post, respond as if you're commenting on Reddit:
human
[Punisher] What is the biggest and most harmful crime that the Punisher will not kill a person for?
gpt
I can't imagine him objecting too much to a revenge-for-severe-transgression-against-me murder, if it didn't spill over onto any innocents. 

He's also demonstrated the presence of mind to let criminals go when it would be excessively cruel. In "Welcome to the Bayou" he is saved from a cannibal redneck family by the assistance of a gangbanger he'd been keeping in the trunk of his car; Frank lets the 'banger go out of a sense of gratitude. In "Archie Meets the Punisher," Frank eventually decides to let his target (who we are told is a very bad man) live, because being in peaceful little Riverdale reminds him of how things could have been if his family had survived, and he can't bring himself to scar the locals by blowing out his brains in front of everyone.