Schuyler Towne, one of the fastest lock pickers in the world, says his fellow "locksporters" are guided by a strict code of ethics: Never pick a lock you don't own, or one that's in regular use.

In Jenny LeClue, you pick locks using a child's hairpin with a bright butterfly on the end. In Sleeping Dogs it's all clean and abstracted, just line up the pins.

Over the past decade, “locksport”—the organized recreational picking of locks by amateur enthusiasts—has become a thriving subculture. Participants… ...

But in a long statement, Ikon maker Assa Abloy argues 3-D printing bump keys to its locks is an expensive, unreliable trick that doesn't work on some locks whose keys have hidden or moving parts.