What kind of hackers use their knowledge to break into systems just for the fun of it refer to themselves as a hacker?

Hackers who break into systems for the fun of it are often referred to as "black hat hackers" or "script kiddies" if they use existing scripts or tools without deep knowledge. They typically engage in unauthorized access to systems to explore vulnerabilities or demonstrate their skills, rather than for malicious intent. Some may also identify as "hacktivists" if their activities are politically motivated, but the primary distinction is that their actions are not sanctioned.