Hacker is an ambiguous term. It may mean tinkerer or someone who breaks computer systems, be it with good or bad intentions. Generally hackers are knowledgeable people and their knowledge can mean danger.
This design for computer hackers is meant to instill the well-deserved respect other should have. It shows the word HACKER in curved capital letters, the biohazard sign used to label biological materials that carry a significant health risk, and a Bash fork bomb command.